Purpose Statement

This prolegomenon establishes the boundaries, vocabulary, and method of the study of concealment languages before any specialized inquiry begins. Its first task is corrective. Scholarship on “secret love” and coded speech has been confined largely to a single category, most visibly in lavender linguistics. Criminology, dialectology, and cryptography have each examined their own fragments of the same phenomenon. Each discipline has seen accurately what lay within its own field of view, but none has joined its findings to the others. What is lost in that separation is the recognition that the lover’s private code, the thieves’ cant, the persecuted community’s veiled idiom, and the rival guild’s trade secret all answer to a common pressure and follow a common pattern of development. This prolegomenon restores the field to its proper breadth so that the narrower studies may be read as parts of a single subject rather than as unrelated curiosities.

The governing principle of the field is simple: what cannot be admitted must be encoded. Where speech about a deed, desire, identity, or practice carries social, legal, or moral danger, those who must still speak of it develop forms of speech that disclose to insiders what they hide from outsiders. The degree to which such speech becomes elaborate depends on three drivers. Pressure is the severity of the consequences of exposure. Density is the number of people who must share the code and the frequency of their contact. Duration is the length of time over which the code must remain in use. Together these explain why some concealment remains a matter of a few private words between two people while other concealment grows into a full communal language with its own lexicon, grammar of allusion, and means of transmission.

To make comparison possible without confusion, the prolegomenon draws the distinctions on which the rest of the suite depends. It separates dyadic codes shared between two parties from communal languages shared across a group. It distinguishes concealment from privacy and from discretion, since not every unspoken matter is a hidden one. It distinguishes the guilty concealer, who hides wrongdoing; the persecuted concealer, who hides from unjust power; and the competitive concealer, who hides advantage from rivals. Above all, it separates the analysis of mechanism from moral evaluation. The same linguistic devices may serve a thief or a martyr, and the study must describe how a code works before it judges what the code is used to hide.

The prolegomenon also addresses the peculiar condition of the evidence. Underground languages are known chiefly through those who sought to expose them: informers, magistrates, satirists, and lexicographers. The record of hidden speech is therefore an exposer’s archive, shaped by the interests, misunderstandings, and exaggerations of hostile or outside observers. From this condition follow specific rules of source criticism, which the prolegomenon sets out so that later studies do not mistake an accuser’s glossary for a faithful account of a living language.

To give the suite a shared working vocabulary, the prolegomenon defines four axes along which any concealment language may be described: what is concealed, by what mechanism, for what function, and at what stage of its lifecycle. These axes allow cases drawn from widely separated times, places, and communities to be compared on the same terms.

The prolegomenon grounds this framework in Scripture, which speaks directly to the relationship between hidden deeds and the speech that surrounds them. John 3:19–21 sets out the moral pattern of those who love darkness because their deeds are evil and avoid the light lest those deeds be reproved. Job 24:13–17 describes those who rebel against the light and make the night their morning. Proverbs 9:17 gives voice to the appeal of stolen waters and bread eaten in secret. Isaiah 5:20 condemns those who call evil good and good evil, and Isaiah 29:15 pronounces woe upon those who hide their counsel deep from the LORD. Ephesians 5:11–13 commands that the unfruitful works of darkness be exposed rather than joined, and Luke 12:2–3 declares that nothing covered will remain unrevealed. Judges 12:5–6 records the earliest biblical instance of a spoken shibboleth used to test identity. Matthew 13:10–13 shows that veiled speech may also serve as a means of divine teaching that separates the receptive from the hardened. The Song of Solomon stands as a deliberate counterexample: a body of honorable veiled speech in which reserve and figurative language serve covenant love rather than hidden sin. These texts supply both the moral framework within which concealment is judged and the reminder that not all veiled speech is shameful.

Finally, the prolegomenon defines the method of the suite as the disciplined combination of comparative lexicography, sociolinguistics, institutional analysis, and biblical moral theology, with explicit limits on what each of these approaches can and cannot establish. It closes with a map of the remaining works, showing how they relate to one another and in what order they are best read, so that the reader enters the specialized studies with the boundaries, terms, and method of the whole field already in hand.

1. The Problem of the Narrowed Field

The study of hidden speech has never lacked for scholars. It has lacked for a field. Across the last century and a half, at least four disciplines have taken up the languages people use to say what cannot safely be said, and each has produced valuable work. Yet each has defined its object so as to exclude the objects of the others, and the result is a body of scholarship that describes the parts of a single phenomenon without recognizing that they are parts. The lover’s private code, the thieves’ cant, the travelling community’s secret vocabulary, and the cipher of the conspirator have been catalogued in separate libraries, reviewed in separate journals, and judged by separate standards. This section traces how that division arose, what each discipline has seen clearly, and what has been lost because their findings have not been joined.

Lavender Linguistics and the Language of Concealed Desire

The scholarship most readily associated with “secret love” is the study of the speech of same-sex communities, given the name lavender linguistics by William Leap and institutionalized through the Lavender Languages and Linguistics conference from the early 1990s onward. Its antecedents reach back further, to glossaries such as the one Gershon Legman compiled in 1941 as an appendix to George Henry’s clinical study Sex Variants, and to the documentation of Polari in mid-twentieth-century Britain. This body of work has rightly observed that communities under legal and social threat develop vocabularies that permit recognition among insiders while preserving deniability before outsiders. It has recorded the use of innocent-seeming words with insider meanings, the adoption of foreign and theatrical borrowings, and the role of shared idiom in sustaining a hidden network.

The limitation of this scholarship lies in the narrowness of its category. By attaching the study of concealed affection and concealed desire almost wholly to one community, it has implied that the phenomenon belongs to that community rather than to the human condition generally. Concealed courtship, illicit liaison, and forbidden attachment of every kind have produced coded speech throughout recorded history: the adulterer’s arrangements, the clandestine betrothal, the affair between persons of unequal rank, the romance across lines of faith or nation that families or rulers forbade. Victorian newspapers carried enciphered personal advertisements in their agony columns, some of which were read for amusement by Charles Wheatstone and Lyon Playfair. The so-called language of flowers offered a vocabulary of sentiment that could be exchanged under the eyes of chaperones. None of this falls comfortably within lavender linguistics as practiced, and so none of it has been studied alongside the material that does. A further consequence is that the field has tended to treat concealment chiefly as resistance to persecution, which is one function of hidden speech but not the only one, and which leaves the scholar without a framework for concealment that serves wrongdoing.

Criminology and the Cant of the Underworld

The oldest continuous tradition of writing on hidden speech is the literature of the criminal underworld. Its sources include the Liber Vagatorum of the early sixteenth century, which glossed the Rotwelsch of German vagrants and was reissued with a preface by Martin Luther in 1528; Thomas Harman’s Caveat or Warening for Commen Cursetors of 1567; Robert Greene’s coney-catching pamphlets of the early 1590s; and Francis Grose’s Classical Dictionary of the Vulgar Tongue of 1785. Earlier still, the trial records of the Coquillards at Dijon in 1455 preserved fragments of the jargon associated with François Villon’s ballads. Modern criminology and the sociology of deviance inherited this material and extended it into studies of prison argot, drug-trade vocabulary, and the slang of organized crime.

This tradition has seen clearly that hidden speech serves the practical needs of those who must coordinate actions the law forbids: identifying confederates, naming victims and targets, warning of danger, and discussing goods and methods without being understood by bystanders. Its weakness is the mirror image of the weakness in lavender linguistics. Where that field tends to see concealment as innocent self-protection, the criminological tradition tends to see it as evidence of guilt. The concealer is by definition the offender. This leaves no room for the persecuted community whose speech resembles cant in every mechanical respect, and it has led to repeated errors in which the vocabulary of the poor, the itinerant, or the religiously dissenting was read as proof of criminal conspiracy. The tradition also rarely asks how the cant of thieves relates to the coded speech of lovers, though the two have often shared both vocabulary and social setting.

Dialectology and the Secret Languages of Communities

Dialectologists approached hidden speech from a third direction, treating it as a variety of language spoken by a definable group. Shelta, the secret language of Irish Travellers, drew the attention of Charles Leland in the 1870s and of Kuno Meyer and others afterward. Back slang among costermongers, the rhyming slang associated with London’s East End, Parlyaree among showmen and circus people, and local inventions such as Boontling in Boonville, California, have all been recorded as dialects or jargons with their own lexical stock and patterns of formation.

The strength of this approach is its attention to the linguistic machinery itself: the inversion of syllables, the substitution of rhyme for referent, the borrowing from Romani, Yiddish, Italian, and Irish, and the persistence of particular formation rules across generations. Its weakness is a tendency toward moral and functional neutrality that strips the speech of its reason for existing. A secret language recorded as a dialect is often recorded after the pressure that produced it has eased, when it survives as heritage, identity marker, or entertainment. Dialectology thus tends to see concealment languages at the end of their life rather than at their height, and to describe their forms without asking what they were built to hide or from whom.

Cryptography and the Engineering of Secrecy

The fourth discipline treats concealment as a technical problem. The history of cryptography, given its standard modern survey in David Kahn’s The Codebreakers of 1967, follows the development of ciphers, codes, nomenclators, and steganographic methods from antiquity through the electronic age. Johannes Trithemius’s Steganographia, the cipher correspondence of Mary, Queen of Scots, and its breaking by Thomas Phelippes in the service of Francis Walsingham, and the diplomatic and military codes of every major power belong to this history.

Cryptography has seen with great precision how a message may be made unreadable to an adversary and how an adversary may recover it. It has developed rigorous concepts of key, channel, and attack. Its limitation is that it concerns itself almost entirely with deliberate, designed systems used by trained parties, and it has little interest in the informal, organic coding that arises within a community without any single designer. The Babington letters and a costermonger’s back slang both conceal, but the history of cryptography attends to the first and ignores the second. It likewise treats the content of the message as irrelevant to the analysis, which serves the codebreaker well but tells the student of human speech little about why certain matters, and not others, come to require encoding.

What Is Lost When the Fragments Are Not Joined

The cost of this division is not merely that four bodies of literature go unread together. Several features of the phenomenon become invisible when it is studied only in pieces.

First, the shared mechanisms are obscured. Euphemistic substitution, metaphorical displacement, foreign borrowing, syllabic inversion, rhyme replacement, and the assignment of private meanings to common words appear in the speech of lovers, criminals, travellers, dissenters, and conspirators alike. Seen separately, each appearance looks like a local invention. Seen together, they reveal a limited repertoire of devices that human communities reach for repeatedly when speech must be both shared and hidden.

Second, the actual historical connections between these languages are missed. Polari drew on Parlyaree, on thieves’ cant, on Romani, and on Yiddish. Rotwelsch absorbed a large Hebrew and Yiddish element. The cant recorded by Harman and Grose overlapped with the speech of itinerant performers and the urban poor. The populations who used these languages frequently mingled in the same lodging houses, fairs, prisons, and taverns, and their vocabularies passed among them. A scholarship divided by discipline cannot follow words across these social boundaries.

Third, each discipline imports a single moral posture and applies it to the whole of its material. Lavender linguistics tends to presume the innocence of the concealer, criminology tends to presume guilt, dialectology tends to suspend judgment entirely, and cryptography regards the content of the message as beside the point. None of these postures is adequate, because concealment is morally various. Some who hide are guilty, some are persecuted, and some are simply guarding advantage from rivals. A field that cannot hold these possibilities together cannot evaluate any particular case justly. Scripture, as later sections will show, treats hidden speech as one moral subject requiring discernment, condemning the love of darkness that shields evil deeds while also recognizing veiled speech that is honorable or even divinely ordained.

Fourth, the lifecycle of a concealment language is broken into unconnected stages. Cryptography attends chiefly to design. Lavender linguistics attends to the period of active communal use. Criminology meets these languages most often at the moment of exposure, through the informer and the magistrate. Dialectology finds them in their afterlife, when they survive as slang or heritage. Each discipline therefore mistakes one stage for the whole, and none can trace how a code arises under pressure, grows in density and duration, comes under hostile observation, is exposed, and either dies or passes into common speech.

The prolegomenon exists to remedy this division. The sections that follow propose a governing principle that accounts for the phenomenon across all four disciplines, a set of distinctions that allow cases to be compared without collapsing them into one moral category, a critical approach to sources that recognizes how much of the record comes from those who sought to expose it, and a common vocabulary by which the specialized studies of the suite may speak to one another.

2. The Governing Principle

If the study of concealment languages is to be a single field rather than four neighboring ones, it requires a principle that accounts for the phenomenon wherever it appears. That principle can be stated briefly: what cannot be admitted must be encoded. Where a deed, a desire, an identity, a belief, or a practice cannot be spoken of openly without danger, and yet must still be spoken of, those who share it will develop forms of speech that convey meaning to intended hearers while withholding it from others. This section sets out the terms of that principle, explains why it holds, and identifies the three conditions that determine how far any particular code will be elaborated.

The Two Conditions of Encoding

The principle rests on two conditions that must be present together. The first is that the matter cannot be admitted. To admit something is to speak of it in plain terms before hearers who might act on what they hear. Admission becomes impossible when those hearers include parties with the power or the will to punish, shame, dispossess, or defeat the speaker: magistrates, religious authorities, families, employers, neighbors, rivals, or enemies. The second condition is that the matter must nonetheless be spoken of. Those who share it need to arrange meetings, recognize one another, warn of danger, transmit knowledge, express affection, or coordinate action. If communication is unnecessary, the result is silence rather than code. If admission carries no danger, the result is plain speech.

Concealment languages arise in the space between these two conditions. They are a compromise between the need to communicate and the need to hide, and every feature of their design reflects that compromise. A code that hides too well fails to communicate; a code that communicates too plainly fails to hide. The history of hidden speech is in large part the history of communities searching for the point at which both needs can be met at once.

This compromise is as old as human guilt. When Adam and his wife heard the voice of the LORD God in the garden, they hid themselves among the trees, and when called to account, Adam answered not with admission but with explanation and deflection (Genesis 3:8–12). The impulse to hide the deed and to manage speech about it appears at the very beginning of the biblical account of fallen humanity. Later sections will examine the scriptural treatment of hidden speech in detail; here it is sufficient to observe that the principle describes something rooted in human nature rather than in any single culture or period.

Encoding Defined

To encode, in the sense used throughout this suite, is to attach meaning to a form of expression in such a way that the meaning is available to those who hold the key and unavailable, or deniable, to those who do not. The key need not be a formal system. It may be shared experience, membership in a community, knowledge of a foreign or archaic vocabulary, familiarity with a set of allusions, or simply a prior agreement between two people. The form of expression may be a word, a phrase, a gesture, a garment, a flower, an object placed in a window, or a pattern of conduct. What makes it a code is the gap between what it says to the outsider and what it says to the insider.

Two features of encoding deserve particular attention. The first is deniability. Many concealment languages do not aim at total opacity but at plausible innocence. A word with an ordinary meaning and a hidden one protects the speaker better than an obviously foreign word, because the speaker overheard can claim to have meant the ordinary sense. The second is recognition. Codes do not only carry messages; they also identify those who can read them. To use the hidden vocabulary correctly is to signal membership, and to fail in its use is to reveal oneself as an outsider. The test at the fords of the Jordan, where the Gileadites required those crossing to say shibboleth and discovered the Ephraimites by their pronunciation (Judges 12:5–6), shows how readily the boundary between insider and outsider comes to be marked in speech.

The Three Drivers of Elaboration

The governing principle explains why concealment languages exist. It does not by itself explain why some remain a handful of private words while others grow into full vocabularies with hundreds or thousands of terms, conventions of formation, and means of teaching newcomers. That difference is governed by three conditions, which this suite calls pressure, density, and duration.

Pressure is the severity and likelihood of the consequences that follow exposure. Those consequences may be legal, as in the case of criminal penalties; religious, as in excommunication or inquisition; social, as in disgrace or ostracism; familial, as in disinheritance; or economic, as in the loss of trade advantage to a competitor. Where pressure is low, a light and casual code suffices, and lapses into plain speech carry little cost. Where pressure is high, codes become more opaque, more carefully guarded, and more dependent on deniability. Terms that become known to outsiders must be abandoned and replaced, and speakers learn to layer meaning so that a phrase can be retreated from if challenged.

Pressure does not increase elaboration without limit. At its most extreme, the risk of any speech at all may drive a community into near silence, preserving its practices through gesture, ritual, or unspoken habit rather than through an elaborate vocabulary. The crypto-Jewish families of Spain and Portugal after the expulsions and forced conversions of the late fifteenth century often preserved their identity less through a hidden language than through domestic customs whose meaning was not always explained even to the children who kept them. Pressure therefore drives elaboration up to the point at which speech itself becomes too dangerous, and beyond that point it drives concealment into other channels.

The relief of pressure has an equally visible effect. When the danger that produced a code is removed, the code begins to lose its reason for existing. Polari, which had served same-sex communities in Britain under criminal prohibition, was brought before a national audience through the BBC radio comedy Round the Horne in the later 1960s, and its use declined sharply in the years that followed the partial decriminalization enacted by the Sexual Offences Act of 1967. Exposure and the easing of pressure together left the language with little to conceal and no means of concealing it. The same pattern recurs wherever the conditions behind a code change: the language passes into slang, heritage, or memory.

Density is the number of people who must share the code and the frequency of their contact with one another. At its lowest, density is two: the pair of lovers, the agent and his handler, the two partners in a single fraud. Codes at this level can be small, improvised, and entirely private, because their users can agree on terms directly and need not teach them to anyone else. As density rises, the code must be standardized so that strangers within the community can understand one another, taught so that newcomers can enter it, and guarded so that no single member’s lapse exposes all the rest.

High density favors elaboration because shared contact multiplies occasions for coining and spreading terms. The richest concealment vocabularies have generally arisen in settings where many people who share a secret are crowded together for long periods: prisons, lodging houses, fairs, ports, military camps, and the circuits of travelling performers and traders. Rising density also brings rising risk, since every additional speaker is another possible informer. Communities of high density therefore tend to develop tests of membership, ways of discovering whether a newcomer truly belongs, alongside their vocabulary of concealment.

Duration is the length of time over which a code must remain in use. A code needed for a single evening, a single journey, or a single transaction can be improvised and discarded. A code that must serve a community for decades or centuries must be transmitted across generations, and in that transmission it accumulates vocabulary, settles its conventions, and acquires a history of its own. Rotwelsch persisted in the German-speaking lands for several centuries, absorbing successive layers of borrowing. Shelta passed through generations of Irish Travellers. Long duration produces depth and stability, but it also exposes the code to repeated hostile observation, so that terms are continually compromised and replaced. A long-lived concealment language is thus marked both by an ancient core and by a constant turnover at its edges.

The Interaction of the Three Drivers

Pressure, density, and duration do not act independently. The degree of elaboration in any concealment language reflects the combined effect of all three, and comparing cases along these lines explains much of the variety the field contains.

Where pressure is high but density and duration are low, the result is the private code of a pair or a very small circle: a lovers’ cipher in the personal columns, a set of agreed signals between conspirators, a few words with private meanings known to two people alone. Such codes may be ingenious, but they remain small because they have few users and short lives.

Where pressure, density, and duration are all high, the result is a full communal language with an extensive lexicon, established patterns of word formation, means of instruction, tests of membership, and a recognizable identity. The historic cants of the underworld and the secret vocabularies of persecuted communities belong to this category.

Where density and duration remain high but pressure falls, the result is a jargon or dialect that persists as a marker of identity or occupation long after its concealing function has weakened. Much of what dialectologists recorded belongs here, which is why the dialectological tradition so often met concealment languages in their afterlife rather than at their height.

Where pressure and density are high but duration is short, the result is a burst of coded speech that arises around a single crisis or enterprise and disappears with it, such as the vocabulary of a particular conspiracy, a wartime resistance network, or a short-lived illicit trade.

These combinations are not rigid types but points along a continuum. Their value lies in allowing cases from widely separated times and places to be compared on common terms, so that the lovers’ cipher, the thieves’ cant, and the travellers’ secret language can be seen as products of the same conditions operating at different strengths.

The Limits of the Principle

The governing principle is descriptive. It explains why concealment languages arise and why they take the forms they do, but it does not establish whether any particular concealment is justified. The same pressure that drives a persecuted believer to guard his speech also drives a thief to guard his, and the principle applies to both alike. Moral evaluation requires a separate inquiry, which later sections will take up under the distinction between mechanism and moral evaluation and in the treatment of the scriptural foundations of the field.

Nor is the principle deterministic. Pressure, density, and duration describe the conditions under which human beings choose how to speak; they do not remove the choice. Some under pressure choose open confession rather than concealment, accepting the consequences of admission. Some choose to abandon the hidden deed rather than to develop the speech that would shelter it. Scripture consistently addresses the concealer as a moral agent who may come to the light (John 3:21), and the field must likewise treat those who develop and use concealment languages as responsible persons rather than as mere products of their circumstances.

With the governing principle and its three drivers established, the prolegomenon turns to the distinctions needed to apply them with care. Without those distinctions, the breadth that the principle restores to the field would collapse into a single undifferentiated category, and the errors of the narrowed disciplines would simply be reproduced on a larger scale.

3. Key Distinctions

The governing principle restores breadth to the field, but breadth without distinction invites confusion. If every instance of hidden speech is treated as the same kind of thing, the lovers’ cipher, the persecuted believer’s guarded word, the merchant’s trade secret, and the thief’s cant collapse into a single category, and the scholar is left either condemning all of them or excusing all of them. The narrowed disciplines described in the first section each fell into one form of this error. This section sets out four distinctions that allow the field to compare cases without confusing them: between dyadic codes and communal languages, between concealment and its neighboring conditions of privacy and discretion, among the three types of concealer, and between the analysis of mechanism and the work of moral evaluation.

Dyadic Codes and Communal Languages

A dyadic code is one shared between two parties, or at most among a circle so small that its members can agree on every term directly. A communal language is one shared across a group large enough that its members do not all know one another, that newcomers must be taught it, and that it persists independently of any particular speaker. The difference corresponds to the lowest and highest points along the axis of density described in the previous section, but it is more than a difference of scale. The two kinds of code arise differently, function differently, leave different traces, and are exposed by different means.

A dyadic code is negotiated. Its terms are chosen by the parties who use it, often deliberately, and it may be altered or abandoned at their mutual convenience. Its vocabulary is usually small and tied closely to the particular matter it conceals: the place of meeting, the signal that the way is clear, the name that stands for a person who must not be named. It may borrow the apparatus of formal cryptography, as in the nomenclator used in the correspondence between Mary, Queen of Scots, and Anthony Babington, or it may consist of nothing more than private meanings attached to ordinary words. Its strength is intimacy, since only two people need to keep it. Its weakness is fragility, since the loss or betrayal of either party, or the interception of a single document, may expose the whole.

A communal language is inherited. Its speakers learn it from those who came before them and pass it to those who come after. No single speaker designed it, and no single speaker can change it at will. Its vocabulary tends to be broad, covering not only the hidden matter itself but the whole social world that surrounds it: insiders and outsiders, allies and enemies, places of safety and places of danger, the authorities to be avoided and the means of avoiding them. Its strength is resilience, since it does not depend on any one speaker. Its weakness is exposure through numbers, since every additional speaker is another possible informer, and a community large enough to need a full language is large enough to contain those who will sell it.

The two forms also leave different records. Dyadic codes survive chiefly in intercepted letters, seized papers, court evidence, and the occasional memoir. They rarely produce glossaries, because there is no community whose speech can be collected. Communal languages survive chiefly in lexicons and descriptive accounts compiled by outsiders, as the fourth section will discuss, and in the residue they leave in ordinary speech after their concealing function fades. A study that confuses the two will misjudge its sources, expecting a vocabulary where only a few private signals ever existed, or treating a single intercepted cipher as evidence of an entire community’s language.

Between these poles lie intermediate forms: the small network of conspirators, the circle of friends who share a forbidden attachment, the family that keeps a secret across generations. Such groups often begin with dyadic arrangements that grow into communal speech as their membership increases and their duration lengthens. The transition from one form to the other is itself an important object of study, since it marks the point at which a private secret becomes a social institution.

Concealment, Privacy, and Discretion

Not every unspoken matter is a hidden one, and the field must distinguish concealment from two neighboring conditions with which it is easily confused.

Concealment is the active hiding of a matter from those who have, or claim, a right or power to know it, accompanied by the intention that they should not know it. It typically involves either deception or the deliberate maintenance of a false appearance. The concealer does not merely refrain from speaking; he arranges his speech and conduct so that those from whom he hides will draw a mistaken conclusion or no conclusion at all.

Privacy is the withholding of a matter from those who have no rightful claim to know it. It involves no deception, because the outsider is not misled about anything that belongs to him. Scripture not only permits privacy but in certain cases commands it. Jesus Christ instructed His disciples to give alms in secret and to pray in the closet with the door shut, so that their devotion would be seen by the Father rather than performed before men (Matthew 6:3–6). The marriage relationship, the counsel of friends, and the ordinary affairs of a household all rightly carry a measure of privacy that no outsider may demand to see. Privacy may employ reserved speech, but it does not require a code, because it does not need to deceive anyone.

Discretion is restraint in speech exercised for reasons of propriety, kindness, modesty, or wisdom. Where privacy concerns whether a matter is disclosed at all, discretion concerns how a matter is spoken of when it is disclosed. Proverbs commends the one of a faithful spirit who conceals a matter rather than going about as a talebearer (Proverbs 11:13), and observes that it is the glory of God to conceal a thing (Proverbs 25:2). The scriptural use of euphemism in matters of the marriage bed, as when it is said that Adam knew Eve his wife (Genesis 4:1), is a form of discretion rather than concealment. The meaning is plain to every reader; the reserve lies in the manner of speaking, not in any attempt to hide what is meant.

Three questions separate these conditions. The first concerns the outsider: does the person from whom the matter is withheld have a rightful claim to know it? The second concerns intention: is the speaker trying to produce a false belief, or merely declining to speak? The third concerns the code itself: would the meaning be plain to any ordinary hearer, or is it accessible only to those who hold a key? Concealment answers yes to the first, aims at a false or absent belief in the second, and depends on a key in the third. Privacy answers no to the first. Discretion produces meaning that any competent hearer can grasp.

These conditions are not fixed properties of particular words or practices. The same euphemism may serve discretion in one setting and concealment in another, depending on who hears it and what they are meant to understand. The same withheld fact may be private in relation to a stranger and concealed in relation to a spouse, a parent, a court, or a congregation with a rightful claim to know it. The field must therefore classify speech by its relation to its hearers rather than by its form alone.

The Guilty Concealer, the Persecuted Concealer, and the Competitive Concealer

Among those who genuinely conceal, the field distinguishes three types according to the moral standing of what is hidden and of those from whom it is hidden.

The guilty concealer hides wrongdoing from those who have a rightful claim to judge or prevent it. This is the pattern Scripture describes when it says that everyone who does evil hates the light and does not come to the light, lest his deeds be reproved (John 3:20). The thief hiding his plans from the watchman, the adulterer hiding his liaison from the spouse he has wronged, and the conspirator hiding his design from the lawful authority all belong to this type. The guilty concealer’s code shelters a deed that would rightly be condemned if it were known.

The persecuted concealer hides what is right or innocent from those who would punish it unjustly. Rahab hid the spies of Israel from the king of Jericho (Joshua 2:1–7). Obadiah hid a hundred prophets of the LORD in caves from the hand of Jezebel (1 Kings 18:4). The LORD Himself hid Jeremiah and Baruch when Jehoiakim sought to seize them (Jeremiah 36:26). Believers under hostile governments throughout history have guarded the times and places of their assemblies, the names of their teachers, and the copies of their Scriptures. The persecuted concealer’s code shelters something good from a power that has no right to destroy it.

The competitive concealer hides an advantage from rivals who have no claim to share it. The craft guild guarding its methods, the merchant protecting his sources and prices, the trader whose secret vocabulary keeps customers and competitors from understanding his dealings, and the state guarding its military intelligence from an enemy all belong here. The authorities of the Venetian Republic, for example, sought to keep the techniques of the Murano glassmakers from passing to foreign rivals by restricting the movement of the craftsmen themselves. The competitive concealer is neither guilty nor persecuted in himself; his concealment is morally ordinary, and its rightness depends on whether the advantage he guards was honestly obtained and honestly used.

These types are defined by relation, not by community. A single group may contain all three, and a single person may stand in different relations to different outsiders. A travelling trader may conceal his prices competitively from customers, conceal his movements as a persecuted man from authorities who harass his people without cause, and conceal a theft as a guilty man from those he has robbed, all within the same vocabulary. A community may be guilty with respect to what it hides by the standard of Scripture while also suffering treatment from its persecutors that exceeds any just judgment. The categories therefore describe the moral character of particular acts of concealment, not the identity of whole peoples.

Assigning a case to one of these types requires a standard outside the concealing community and outside the community from which it hides. Every concealer tends to regard himself as persecuted, and every exposer tends to regard the concealer as guilty. If the scholar adopts either view without examination, he simply repeats one party’s account of itself. This suite takes the moral teaching of Scripture as that external standard, as the sixth section will set out in detail. Under that standard, the question is not whether a community feels persecuted or whether its enemies call it criminal, but whether what it hides is righteous or sinful and whether those from whom it hides it are exercising lawful authority or unjust power.

Mechanism and Moral Evaluation

The final distinction governs the order and discipline of the field’s work. The analysis of mechanism asks how a concealment language works: what devices it uses, how its vocabulary is formed, how it is transmitted and guarded, how it relates to neighboring languages, and how it changes over time. Moral evaluation asks whether a particular concealment is right or wrong, and what response it deserves from those who encounter it.

The two inquiries must be kept distinct because confusing them corrupts both. When moral judgment shapes description, the scholar sees only what his judgment expects. Hostile observers have repeatedly described the speech of communities they despised as more sinister, more organized, or more criminal than it was, and sympathetic observers have described the speech of communities they favored as more innocent, more spontaneous, or more purely defensive than it was. In both cases, what is presented as description is really a verdict in disguise. Conversely, when the sophistication of a mechanism is allowed to stand in for a judgment, the scholar may be led to admire a code for its ingenuity without asking what it was built to hide, or to condemn a code for its opacity without asking whom it protected. Ingenuity is not innocence, and opacity is not guilt.

The mechanisms of concealment are morally neutral in themselves. Euphemistic substitution, foreign borrowing, syllabic inversion, and private signals serve the guilty, the persecuted, and the competitive alike. The Gileadites at the Jordan used a shibboleth to expose enemies (Judges 12:5–6); a persecuted community may use the same kind of test to exclude informers; a criminal gang may use it to exclude the watch. The device is the same in each case. What differs is the moral standing of the parties and of the matter concealed.

For this reason the field describes mechanism first and evaluates second. Description must be as accurate as the evidence allows, without coloring by sympathy or hostility. Evaluation, however, is not optional. A study of concealment languages that refuses to judge has not achieved neutrality; it has merely declined to answer the question that the subject most urgently raises. Scripture pronounces woe on those who call evil good and good evil (Isaiah 5:20), and that warning applies to scholars who obscure the moral character of what they study as much as to those who practice concealment themselves. The aim is to describe truthfully and then to judge rightly, holding both tasks to the same standard of honesty.

With these distinctions in place, the field can begin to address the most practical difficulty it faces. Nearly everything known about hidden speech comes from those who were not meant to understand it. The next section examines this condition of the evidence and the rules of source criticism that must govern its use.

4. The Exposer’s Archive

The student of concealment languages faces a difficulty that is built into the subject itself. A code succeeds to the degree that outsiders cannot read it, and a code that succeeds completely leaves no record intelligible to anyone outside the circle that used it. What survives in the documentary record is therefore weighted heavily toward codes that failed: codes that were betrayed, intercepted, overheard, confessed, mocked, or collected. Nearly everything known about the historic underground languages comes from people who were not meant to understand them and who recorded them for purposes of their own. This section examines the four principal classes of those recorders, the distortions their interests introduced, and the rules of source criticism that must govern any responsible use of their testimony.

The Paradox of the Record

The documentary record of hidden speech is not a sample of concealment languages as they existed. It is a sample of concealment languages at the moment of their exposure. This has several consequences. Codes used by small groups for short periods are underrepresented, because they offered few opportunities for betrayal and left few documents to seize. Codes used by groups who never came before a court, never attracted a satirist’s attention, and never drew a lexicographer’s interest are absent altogether. Dyadic codes appear chiefly when a letter was intercepted or a party turned informer. Communal languages appear chiefly when they had grown large enough, or their users notorious enough, to attract hostile observation.

The record therefore tells the scholar most about the stage of a concealment language’s life at which concealment was breaking down. It tells far less about the conditions under which the language first arose, the period during which it served its users well, or the private codes that were never discovered. Any general account of the field must keep this imbalance in view. The absence of evidence for coded speech in a particular community does not establish that such speech did not exist; it may only establish that it worked.

The Informer

The informer is an insider, or a former insider, who passes knowledge of the hidden speech to those who seek to suppress it. Informers have often been the most valuable sources for concealment languages because they knew the code from within, and the least reliable because they had powerful reasons to shape what they disclosed.

Informers frequently acted for reward, for remission of their own punishment, for revenge against former associates, or for the advancement that came from making themselves indispensable to authorities. Jonathan Wild, who presented himself in early eighteenth-century London as a thief-taker while managing a network of thieves, illustrates how fully the roles of insider and exposer could be combined in one person, and how little the exposer’s account could be trusted to reflect the whole truth. Eugène François Vidocq, a former criminal who became head of the French Sûreté, published memoirs in the late 1820s that included material on criminal argot, and those memoirs mingled genuine knowledge with self-promotion and embellishment. In matters of state, the betrayal of a dyadic code often depended on a single intermediary, as when Gilbert Gifford’s handling of the letters of Mary, Queen of Scots, gave Francis Walsingham’s service access to her correspondence with Anthony Babington.

The informer’s testimony must be weighed with particular care because the informer possesses both knowledge and motive. He can supply genuine terms that no outsider could have discovered, but he can also invent, exaggerate, or misattribute them, and he has every reason to present the community he betrays as more dangerous and more organized than it was, since the value of his information rises with the threat it appears to reveal.

The Magistrate

The magistrate is the judge, inquisitor, prosecutor, or court officer who encounters hidden speech in the course of legal proceedings and records it as evidence. Court records preserve some of the earliest surviving specimens of concealment languages. Fifteenth-century records from Basel describe the deceptions and vocabulary of beggars and vagrants, material that later fed into the Liber Vagatorum. The proceedings against the Coquillards at Dijon in 1455 recorded terms of their jargon gathered from testimony. The published Proceedings of the Old Bailey, which ran from the later seventeenth century into the early twentieth, contain abundant cant spoken by witnesses and defendants. The tribunals of the Spanish and Portuguese Inquisitions issued edicts describing the customs by which secret adherence to Judaism might be detected and compiled extensive records of testimony against those accused.

Legal records offer the advantage of fixing particular terms to particular dates, places, and speakers, which few other sources can do. Their limitations are equally serious. Testimony was often given under threat, and in some jurisdictions under torture, which produces statements shaped by what the questioner wished to hear. Clerks recorded unfamiliar words by ear and may have garbled them. The questions put to witnesses determined what was recorded, so that matters the court did not ask about went unrecorded however important they were to the community. Above all, the court approached the hidden speech as evidence of an offense, and its records present the speech within that frame. Where the offense was real, the frame may be accurate; where the court was persecuting innocent or righteous practice, the frame itself is a distortion that the scholar must recognize and remove.

The Satirist

The satirist is the writer, playwright, pamphleteer, or performer who presents hidden speech to a wider public for amusement, moral warning, or profit. Robert Greene’s coney-catching pamphlets of the early 1590s professed to expose the tricks and vocabulary of London cheats for the protection of honest readers, while also entertaining them with the vices they condemned. Thomas Dekker’s Lanthorne and Candle-light of 1608 continued the genre. John Gay’s The Beggar’s Opera of 1728 brought the world of thieves and receivers onto the London stage. In the twentieth century, the BBC radio program Round the Horne introduced Polari to a national audience through comic sketches.

The satirist is valuable because he often reached a wide audience and recorded speech in something resembling its living use, set in dialogue rather than isolated in a glossary. He is unreliable because his first obligation was to his audience rather than to accuracy. Satirists invented terms for comic effect, exaggerated the strangeness of the speech they portrayed, simplified it for readers who had to be able to follow it, and frequently copied from earlier writers rather than observing for themselves. Dekker borrowed heavily from Harman without acknowledgment. The satirist also tends to fix a concealment language in its most colorful and least ordinary forms, since the ordinary was of little use to him. Satire is often a sign that a concealment language has already become partly known, and its publication accelerates the exposure that ends the language’s usefulness.

The Lexicographer

The lexicographer is the compiler who gathers hidden vocabulary into dictionaries and glossaries. The tradition is long. Thomas Harman appended a list of canting terms to his Caveat of 1567, claiming to have gathered them from vagrants who came to his door in Kent. The dictionary of the canting crew attributed to “B. E., Gent.” appeared around 1698. Francis Grose’s Classical Dictionary of the Vulgar Tongue followed in 1785, John Camden Hotten’s slang dictionary in 1859, Gershon Legman’s glossary in 1941, and Eric Partridge’s Dictionary of the Underworld in 1949, along with many others.

Lexicographers appear to offer the most systematic evidence, and their works are indispensable. They are also the source of some of the field’s most persistent errors. Glossaries strip words from the contexts that gave them meaning, so that a term used in one sense by one group in one decade may appear as if it held a fixed meaning for all users at all times. Compilers drew heavily on their predecessors, so that a term recorded once by Harman might be copied by Dekker, then by B. E., then by Grose, and so on into the modern period, giving the appearance of continuous use to a word that may have been obsolete or even fabricated from the start. Collectors who sought words from living speakers were sometimes deliberately misled, since those who kept a code had every reason to give an outsider false or trivial terms. A lexicon may therefore present as a single language what is in fact an accumulation of words drawn from different centuries, regions, and communities, some genuine, some copied, and some invented.

Rules of Source Criticism

These conditions do not make the exposer’s archive useless. They make it a body of testimony that must be examined with the same care that Scripture requires of any witness. The law given to Israel forbade raising a false report and required that a matter be established at the mouth of two or three witnesses (Exodus 23:1; Deuteronomy 19:15). Proverbs observes that he who is first in his own cause seems just, until his neighbor comes and searches him (Proverbs 18:17). The exposer is always first in his own cause, and the scholar’s work is to search him. The following rules govern that work throughout this suite.

First, identify the exposer’s interest. Every source must be asked what its author stood to gain from his account: reward, remission, reputation, revenue, the conviction of an accused party, or the vindication of a policy of suppression. Testimony is not dismissed because its author had an interest, but every claim that serves that interest requires corroboration.

Second, establish the channel of acquisition. The scholar must determine, as far as possible, how the exposer came by his knowledge: by direct hearing, by an informer’s report, by testimony in court, by confession under duress, or by copying from earlier writers. Each channel carries its own characteristic distortions, and a term known only through a single uncertain channel must be treated as provisional.

Third, distinguish attestation from repetition. A term that appears in ten sources is not thereby attested ten times. The genealogy of copying among exposers must be traced, and only independent attestations should count as evidence of actual use. Where all later sources derive from a single original, the term rests on that original alone.

Fourth, date and locate each term separately. No lexicon or collection should be presumed to represent a single language at a single moment. Each term must be fixed, so far as the evidence allows, to the time, place, and community in which it was used. Where this cannot be done, the uncertainty must be stated.

Fifth, weigh coercion. Statements obtained under torture, threat of death, or promise of release must be treated as evidence chiefly of what the questioner sought, and only secondarily of what the speaker knew. Such statements may contain genuine information, but they cannot be taken at face value, and the scholar must ask whether their content follows the questioner’s assumptions too closely to be trusted.

Sixth, seek corroboration across independent witnesses, and from insiders where possible. The strongest evidence for a term or practice comes from agreement between sources that had no knowledge of one another and no shared interest. Insider evidence, where it survives, carries particular weight: letters, memoirs, songs, inscriptions, and the testimony of those who used a language willingly rather than under compulsion. Even insider evidence must be weighed, since insiders also have reasons to shape their accounts, but it provides an indispensable check on the exposer’s view.

Seventh, read against the grain. Exposers often reveal more than they intend. A magistrate’s questions show what the court feared; a satirist’s jokes show what his audience already knew; a lexicographer’s errors show what he did not understand. The scholar should attend not only to what each source asserts but to what its manner of asserting reveals about its author’s position and limitations.

Eighth, account for silence. Because the archive records failures of concealment, the scholar must ask what the exposers could not see. Absence from the record does not establish absence from history, and generalizations about a community’s speech drawn solely from its exposed fragments must be qualified accordingly.

Ninth, test the exposer’s moral frame without presuming it false. The exposer’s characterization of a community as criminal, heretical, or depraved is a claim to be examined by the standard of Scripture, not a conclusion to be adopted or rejected in advance. Some exposers were persecutors who slandered the innocent; others exposed genuine evil, and in doing so performed the work Scripture commands when it calls believers to have no fellowship with the unfruitful works of darkness but rather to reprove them (Ephesians 5:11). The scholar’s sympathy must not automatically follow the concealer any more than it automatically follows the exposer. Each case must be judged on the evidence and by the standard of righteousness.

These rules do not remove uncertainty from the study of hidden speech, but they make that uncertainty visible and manageable. With the condition of the evidence understood, the prolegomenon turns to the common vocabulary by which the suite will describe the cases this archive preserves: the four axes along which any concealment language may be located and compared.

5. The Four Axes

The preceding sections established a governing principle, a set of distinctions, and a method for handling evidence. What the field still lacks is a common descriptive vocabulary. The four disciplines whose fragments this prolegomenon seeks to join each developed its own terms, and each set of terms carries the assumptions of its discipline. The criminologist’s “cant” presumes guilt, the dialectologist’s “dialect” presumes neutrality, the cryptographer’s “cipher” presumes design, and the vocabulary of lavender linguistics presumes a particular community and a particular moral posture. If the specialized studies of the suite are to speak to one another, they must describe their cases in terms that carry none of these presumptions in advance. This section provides those terms by setting out four axes along which any concealment language may be located: what is concealed, by what mechanism, for what function, and at what stage of its lifecycle.

The axes are descriptive. They belong to the analysis of mechanism rather than to moral evaluation, and locating a case on all four does not settle whether the concealment was righteous or sinful. That question is answered separately, by the distinctions of the third section and the scriptural standard of the sixth. The axes ensure that the description on which judgment rests is complete and comparable.

The First Axis: What Is Concealed

The first axis concerns the object of concealment, the matter that cannot be admitted and must therefore be encoded. The suite recognizes eight principal objects.

A deed is an act already done or habitually practiced: a theft, a liaison, an act of worship forbidden by the state, a fraud. A plan is an act intended but not yet performed: a conspiracy, an escape, a meeting, a robbery. A desire or attachment is an inclination or relationship that would bring consequences if known, whether or not it has been acted upon. An identity or membership is a person’s belonging to a group whose existence or allegiance must be hidden: a secret believer, a member of an outlawed society, a fugitive people. A belief is a conviction whose open profession would bring punishment. A technique or body of knowledge is a method or understanding whose disclosure would deprive its holders of advantage or expose them to danger. Goods are property whose possession, origin, or movement must be hidden: stolen articles, contraband, forbidden books. Persons are people who must themselves be hidden: fugitives, refugees, prisoners in flight, or those under sentence.

Objects rarely appear alone. A conspiracy conceals a plan, the identities of its members, and often the goods and persons needed to carry it out. A persecuted congregation conceals its belief, its membership, the places of its assemblies, and its teachers. The suite therefore distinguishes the primary object, the matter whose concealment gives the language its reason for existing, from the secondary objects, the surrounding matters that must also be hidden because they would lead an outsider to the primary one. A full communal language typically develops vocabulary for a wide field of secondary objects, including terms for outsiders, authorities, places of danger and safety, and the means of evading detection. A dyadic code may consist of little more than terms for its primary object.

The Second Axis: By What Mechanism

The second axis concerns the devices by which meaning is hidden from outsiders and made available to insiders. These devices recur across communities and periods, and the suite describes them in the following terms.

Semantic overlay is the attachment of a hidden meaning to an ordinary word or expression, so that the outsider hears the ordinary sense and the insider the hidden one. It provides the greatest deniability, since the speaker overheard can claim to have meant only what the words plainly say.

Borrowing is the introduction of words from a foreign, archaic, or learned language unknown to outsiders. The large Hebrew and Yiddish element in Rotwelsch, the Romani elements found in several European underground vocabularies, and the Italian and theatrical elements in Polari are examples. Borrowing provides opacity but less deniability, since a foreign word is plainly not ordinary speech.

Formal transformation is the alteration of ordinary words by a rule that insiders can apply and reverse. It includes inversion, as in back slang, where words are spoken in reverse; rhyming substitution, as in rhyming slang, where a word is replaced by a phrase that rhymes with it and the rhyming element is often then dropped; insertion, where syllables are added according to a fixed pattern; and clipping, where words are shortened in agreed ways.

Figurative systems are sets of metaphors, allusions, and shared references that carry meaning to those who know the frame. A community may speak of its activities in the vocabulary of a trade, a sport, a household, or a body of literature, so that the whole system of reference must be known before any single phrase can be understood.

Nonverbal signals are gestures, garments, colors, flowers, objects placed in particular positions, marks left on walls or gateposts, and patterns of conduct that convey meaning without speech. Judas’s arrangement with those who came to seize Jesus Christ, that the one he would kiss was the man they sought (Matthew 26:48), is a prearranged nonverbal signal that turned a gesture of affection into an instrument of betrayal.

Designed codes and ciphers are deliberate systems in which elements of a message are replaced according to a key: letter substitutions, numbered codebooks, and nomenclators that combine a cipher alphabet with symbols for frequently used names and words.

Steganography is the concealment of the existence of a message rather than merely its meaning: hidden compartments, invisible inks, messages embedded within innocent texts, or communications carried by unexpected means.

Recognition devices are challenges, passwords, signs, and tests by which insiders identify one another and exclude outsiders. The shibboleth of Judges 12 belongs here, as do passwords, countersigns, and the questions by which a community tests a stranger who claims to belong to it.

Most concealment languages employ several mechanisms at once, and their layering is itself significant. A communal language may combine semantic overlay for everyday use in mixed company, borrowing for matters of greater danger, and recognition devices at its boundaries. The suite therefore describes mechanism as a profile rather than a single label, noting which devices are present, which predominate, and how they relate to one another.

The Third Axis: For What Function

The third axis concerns the tasks that a concealment language performs for its users. Function must be distinguished from the moral type of the concealer described in the third section. The type concerns the moral relation between the concealer, what he hides, and those from whom he hides it. Function concerns what the code does. The same function may serve a guilty, persecuted, or competitive concealer.

Coordination is the arrangement of shared action: meetings, movements, transactions, and plans. Recognition is the identification of fellow insiders among strangers. Exclusion is the detection and rejection of outsiders and informers who seek entry. Warning is the communication of danger, such as the approach of authorities or the presence of an informer. Deniability is the protection of speakers who are overheard, by allowing them to claim innocent meanings. Solidarity is the strengthening of the bond among insiders through the shared possession of a language that outsiders do not have. Transmission is the teaching of knowledge, technique, or belief to newcomers and successors. Display is the use of the language for prestige, play, or performance within the community, as when skill in the code becomes a mark of standing or a source of amusement.

The relative weight of these functions shifts over time. In the earliest stages of a concealment language, coordination and deniability usually predominate. As density and duration increase, recognition, exclusion, solidarity, and transmission grow in importance. When pressure eases, display often becomes the principal function, and the language survives as a source of identity or entertainment rather than as a means of protection. Tracking the balance of functions is one of the clearest ways to locate a language in its lifecycle.

The Fourth Axis: At What Stage of the Lifecycle

The fourth axis concerns the point a concealment language has reached in the course of its existence. The suite distinguishes six stages.

Emergence is the stage at which pressure first makes admission impossible and those who share a matter begin to improvise ways of speaking about it. Codes at this stage are small, unstable, and often known only to their originators.

Elaboration is the stage at which density and duration begin to act, so that the code acquires vocabulary, conventions of formation, and secondary objects. Dyadic arrangements may grow into communal speech during this stage.

Maturity is the stage of stable communal use, in which the language is transmitted to newcomers, guarded by recognition devices, and capable of covering the whole social world of its users.

Exposure is the stage at which the language comes under sustained hostile observation, its terms are recorded by informers, magistrates, satirists, and lexicographers, and its users must replace compromised vocabulary. Exposure may begin at any point; a dyadic code may be exposed in its emergence, while a communal language may resist exposure through long maturity.

Decline is the stage at which the language loses its concealing power, either because pressure has eased so that concealment is no longer necessary, or because exposure has made the code useless, or because the community that used it has dispersed.

Afterlife is the survival of a concealment language, or parts of it, after its concealing function has ended. Its words may pass into ordinary slang, persist as markers of heritage or occupation, appear in literature and performance, or be revived by later generations as objects of interest. Much of what dialectologists recorded, and some of what modern enthusiasts have revived, belongs to this stage.

The lifecycle is a pattern, not a necessity. Many codes never pass beyond emergence, ending when the matter they concealed is resolved or discovered. Some communal languages pass through exposure into renewed maturity, replacing compromised terms and continuing in use. Others pass directly from maturity into afterlife when the pressure behind them is suddenly removed. The suite therefore describes a language’s stage at a given moment and the transitions it underwent, rather than assuming that every language follows the full sequence.

The Concealment Profile

Taken together, the four axes allow any case to be described in a standard form. The suite calls this description a concealment profile. A complete profile states the primary and secondary objects of concealment, the mechanisms employed, the functions served, and the lifecycle stage at the moment under study. To these four axes are added the three drivers of elaboration set out in the second section, which explain why the language took the form it did, and the type of concealer set out in the third section, which provides the basis for moral evaluation.

Two cases illustrate how the profile works.

The arrangement between Jonathan and David recorded in 1 Samuel 20 is a dyadic code in its simplest form. Its primary object was a fact, Saul’s settled intention to kill David, and its secondary object was David’s place of hiding. Its mechanism was a prearranged nonverbal signal: Jonathan would shoot arrows and send a lad to gather them, and his words to the lad about where the arrows lay would tell David whether to remain or flee (1 Samuel 20:20–22, 35–40). The signal also employed semantic overlay, since the instruction to the lad bore an ordinary meaning to the boy and a hidden one to David. Its function was warning and deniability. It never passed beyond emergence, since it was designed for a single use. Pressure was extreme, density was two, and duration was a matter of days. The concealer was a persecuted one, since David was hidden from a king who sought to shed innocent blood.

The correspondence between Mary, Queen of Scots, and Anthony Babington in 1586 is also a dyadic code, but of a very different character. Its primary object was a plan, the assassination of Elizabeth I and the overthrow of her government, and its secondary objects were the identities of the conspirators and the means of foreign support. Its mechanisms were a designed nomenclator and steganographic transport, since the letters were smuggled in and out of Chartley in the casing of a barrel used by a local brewer. Its function was coordination. Its lifecycle was compressed almost to nothing, because the channel was under Walsingham’s control from the start, so that the code passed directly from emergence into exposure. Pressure was extreme, density was low, and duration was short. The concealer was a guilty one, plotting murder against lawful authority.

The two cases share a structure: both are dyadic, both operate under extreme pressure, and both rely on prearranged meaning hidden from a hostile power. The profile makes this shared structure visible while preserving the differences that matter. It shows that the mechanism of the two codes is similar, that their stages of exposure differ completely, and that their moral character is opposite. This is precisely what the narrowed disciplines could not show, since none of them would have studied a biblical signal between friends and a Renaissance cipher between conspirators within the same frame.

Standard Terms for the Suite

To prevent the presumptions of the separate disciplines from re-entering the field through its vocabulary, the suite adopts the following conventions. Concealment language is the general term for any form of speech or signaling that hides meaning from outsiders while conveying it to insiders. Code without qualification refers to a dyadic or small-circle arrangement, and communal language to a code shared across a community. Cipher is reserved for designed systems of substitution operating on letters, numbers, or symbols. Cant, argot, Rotwelsch, Shelta, Polari, and similar names are used only for the particular historical languages to which they properly belong, not as general categories. Slang is used only for vocabulary in the afterlife stage that has passed into general informal speech. Concealer and exposer name the two parties to the relation of hidden speech without implying the moral standing of either, which is assessed separately under the types of guilty, persecuted, and competitive concealment.

With this vocabulary established, the prolegomenon turns to the scriptural foundations on which the moral evaluation of concealment languages rests. The axes and profiles describe how hidden speech works; Scripture supplies the standard by which its use is judged.

6. Scriptural Foundations

The four axes describe how concealment languages work, but description alone cannot answer the question the subject most urgently raises: when is it right to hide, and when is it wrong? The third section established that the field requires a standard outside both the concealing community and the community from which it hides. This suite takes that standard from Scripture. The Bible does not offer a theory of coded speech in the manner of a modern discipline, but it speaks directly and repeatedly to the relationship between hidden deeds and the speech that surrounds them. It explains why people hide, what their hiding reveals about them, how hidden things will finally be disclosed, what duty falls upon those who encounter works of darkness, and how veiled speech may also serve righteous and even divine purposes. This section examines the passages on which the moral evaluation of concealment languages rests and draws from them the principles that govern the suite.

The Love of Darkness: John 3:19–21

The foundational text is the statement of Jesus Christ to Nicodemus: “And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil. For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved. But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God” (John 3:19–21).

This passage supplies the moral root of guilty concealment. The impulse to hide does not originate in circumstance alone but in the condition of the heart. Those whose deeds are evil hate the light because the light reproves them. Concealment is therefore not morally neutral at its source when the thing concealed is sin; it is an expression of love for darkness and an evasion of reproof. The governing principle stated in the second section, that what cannot be admitted must be encoded, here receives its moral explanation. Much of what cannot be admitted cannot be admitted because it is evil, and the code exists to spare the evildoer the reproof his deeds deserve.

The passage also establishes the alternative. The one who does truth comes to the light willingly, so that his deeds may be shown to be wrought in God. Righteous conduct does not fear manifestation. This does not mean that the righteous never withhold anything, since privacy and discretion remain legitimate, as the third section showed. It means that the righteous man’s ultimate disposition is toward openness before God, and that his reserve, where it exists, is not a refuge from judgment. The contrast between these two dispositions provides the basic test for distinguishing the guilty concealer from the others.

Those Who Rebel Against the Light: Job 24:13–17

Job’s description of the wicked gives the principle of John 3 a concrete social form. “They are of those that rebel against the light; they know not the ways thereof, nor abide in the paths thereof. The murderer rising with the light killeth the poor and needy, and in the night is as a thief. The eye also of the adulterer waiteth for the twilight, saying, No eye shall see me: and disguiseth his face. In the dark they dig through houses, which they had marked for themselves in the daytime: they know not the light. For the morning is to them even as the shadow of death: if one know them, they are in the terrors of the shadow of death” (Job 24:13–17).

The passage is remarkable for how closely it anticipates the features of concealment the field studies. The adulterer waits for twilight and disguises his face, reasoning that no eye will see him; this is the logic of deniability. The house-breakers mark in daylight the houses they will enter at night; this is a nonverbal signaling system, prepared openly and read secretly. The murderer and the thief invert the ordinary order of day and night, so that the morning becomes to them like the shadow of death. And the last clause states the pressure that drives the whole system: if one know them, they are in terror. Exposure is the thing they most fear, and their entire manner of life is arranged to avoid it.

Job thus portrays not merely individual acts of concealment but a way of life organized around hiding, with its own times, its own signs, and its own inverted values. This is precisely the condition under which communal concealment languages develop, and the passage provides a scriptural description of the world those languages serve when the concealer is guilty.

The Sweetness of the Hidden: Proverbs 9:17

The woman Folly calls to the simple: “Stolen waters are sweet, and bread eaten in secret is pleasant. But he knoweth not that the dead are there; and that her guests are in the depths of hell” (Proverbs 9:17–18).

This passage identifies a feature of concealment that the purely technical disciplines overlook. Secrecy is not only a means of protecting a forbidden pleasure; it can become part of the pleasure itself. The stolen water is sweet because it is stolen, and the bread pleasant because it is eaten in secret. The hidden quality of the act adds to its allure. This explains a pattern that recurs across many concealment languages: the code becomes valued for its own sake, its mastery becomes a source of pride, and its use becomes a pleasure distinct from whatever practical function it serves. The function the fifth section called display often has this root. The code offers its users the sweetness of belonging to a hidden world and possessing what outsiders cannot share.

Proverbs adds the warning that the pleasure conceals its own end. The guest does not know that the dead are there. The same secrecy that heightens the appeal of the forbidden also hides its consequences from the one who pursues it. Concealment thus deceives not only the outsider but often the concealer himself.

The Inversion of Moral Speech and the Hiding of Counsel: Isaiah 5:20 and 29:15

Two passages from Isaiah address concealment at the level of language and counsel. The first pronounces woe on a particular corruption of speech: “Woe unto them that call evil good, and good evil; that put darkness for light, and light for darkness; that put bitter for sweet, and sweet for bitter” (Isaiah 5:20).

This text has direct bearing on one of the principal mechanisms of concealment, the semantic overlay described in the fifth section. Many concealment languages operate by renaming forbidden things with terms that soften, dignify, or disguise them. Theft becomes a trade, deception a craft, illicit union a friendship, and the victim a fool who deserved his loss. Such renaming serves concealment from outsiders, but it also performs moral work within the community, gradually reshaping what its members are able to call evil. Isaiah’s woe falls on exactly this inversion. A concealment language may therefore be judged not only by what it hides but by what it renames, and the habit of calling evil good is itself a sin, quite apart from the deeds the new names shelter. The same text also warns the scholar, as the third section noted, against obscuring the moral character of what he studies.

The second passage addresses the hiding of counsel: “Woe unto them that seek deep to hide their counsel from the LORD, and their works are in the dark, and they say, Who seeth us? and who knoweth us?” (Isaiah 29:15). The prophet continues by rebuking their turning of things upside down, as though the clay should say of the potter that he had no understanding (Isaiah 29:16).

Here the object of concealment is a plan, and the one from whom it is hidden is not merely human authority but God Himself. The passage exposes the presumption beneath all guilty concealment: the belief that if no human eye sees, no eye sees at all. The questions “Who seeth us? and who knoweth us?” express the confidence on which every code relies. Isaiah declares that confidence false. Whatever a code may accomplish against human observers, it accomplishes nothing against the One who formed the speakers. This places a permanent limit on the power of concealment that no mechanism can overcome, and it frames every human act of hiding within the knowledge of God. The psalmist states the same truth when he confesses that the darkness hides not from God, but the night shines as the day (Psalm 139:11–12).

The Duty of Exposure: Ephesians 5:11–13

Paul instructs the believers at Ephesus: “And have no fellowship with the unfruitful works of darkness, but rather reprove them. For it is a shame even to speak of those things which are done of them in secret. But all things that are reproved are made manifest by the light: for whatsoever doth make manifest is light” (Ephesians 5:11–13).

This passage establishes that exposure of the works of darkness is not merely permissible but commanded. Believers are not to share in such works, and they are to reprove them, bringing them into the light where they are made manifest. The fourth section noted that the exposer’s archive includes both persecutors who slandered the innocent and those who exposed genuine evil. Ephesians makes clear that the second kind of exposure is a righteous work. When an informer or a magistrate brings to light a conspiracy to murder, a ring of thieves, or a system of deception that preys on the innocent, he performs the work this text commands, whatever his personal motives may have been.

The passage also contains a qualification of great importance for the method of the field. It is a shame even to speak of the things done in secret. Exposure does not license the exposer to dwell upon the details of evil, to spread them for entertainment, or to make himself an expert in their practice. The satirist who exposed vice while delighting his readers in it, and the lexicographer who preserved the vocabulary of wickedness as a curiosity, both stood in tension with this instruction. The scholar of concealment languages stands in the same position. The study must make manifest what is hidden where that serves understanding and moral judgment, but it must not become a vehicle for the deeds it describes, a manual for their imitation, or a means of making the forbidden attractive. The suite observes this limit by describing mechanisms and functions in the measure needed for comparison and judgment, and by declining to reproduce the details of evil beyond that measure.

The Certainty of Disclosure: Luke 12:2–3

Jesus Christ warned His disciples against the leaven of the Pharisees, which is hypocrisy, and declared: “For there is nothing covered, that shall not be revealed; neither hid, that shall not be known. Therefore whatsoever ye have spoken in darkness shall be heard in the light; and that which ye have spoken in the ear in closets shall be proclaimed upon the housetops” (Luke 12:2–3).

This passage addresses the temporal limit of all concealment. Every code is temporary. The fourth section observed that the documentary record preserves chiefly those codes that failed; this text declares that in the final reckoning all codes fail. What is spoken in darkness will be heard in light, and what is whispered in closets will be proclaimed from housetops. The lifecycle of every concealment language ends, at the last, in total exposure before God.

The setting of the warning is significant. Jesus Christ spoke these words concerning hypocrisy, the concealment of a true inner condition behind a false outward appearance. Hypocrisy is concealment practiced not through a special vocabulary but through the ordinary speech and conduct of religious life. This extends the scope of the field beyond underground languages into the hidden speech of respectable people, who may conceal sin as thoroughly by pious language as any thief by cant. The study of concealment languages must therefore reckon with concealment in its most socially acceptable forms as well as its most notorious.

The passage also carries comfort for the persecuted concealer. The surrounding verses instruct the disciples not to fear those who can kill the body (Luke 12:4–7). What the persecuted hide from unjust power is hidden only for a season, and its final disclosure will vindicate rather than condemn them. The certainty of disclosure is a terror to the guilty and a hope to the righteous.

The Shibboleth: Judges 12:5–6

The account of the shibboleth is the earliest biblical record of a spoken recognition device. After the conflict between Gilead and Ephraim, “the Gileadites took the passages of Jordan before the Ephraimites: and it was so, that when those Ephraimites which were escaped said, Let me go over; that the men of Gilead said unto him, Art thou an Ephraimite? If he said, Nay; then said they unto him, Say now Shibboleth: and he said Sibboleth: for he could not frame to pronounce it right. Then they took him, and slew him at the passages of Jordan: and there fell at that time of the Ephraimites forty and two thousand” (Judges 12:5–6).

The passage demonstrates several features of hidden speech at once. It shows that differences of speech mark the boundaries of communities, that those boundaries can be tested, and that a speaker may conceal his identity in what he says but betray it in how he says it. The Ephraimite who denied being an Ephraimite was a concealer, and his concealment failed at the level of pronunciation, which he could not control. The Gileadites were exposers who devised a test that his concealment could not pass.

The passage also carries a moral warning about recognition devices. The test was used in the aftermath of a civil war among the tribes of Israel, and it led to the slaughter of forty-two thousand men. The Ephraimites had provoked the conflict by threatening Jephthah (Judges 12:1), but the account of brother slaying brother at the fords is recorded in a book that repeatedly shows Israel’s disorder in the days when there was no king and every man did what was right in his own eyes (Judges 21:25). The shibboleth reminds the field that the devices of exposure, like the devices of concealment, are morally neutral in their mechanism and may serve just or unjust ends. A test that detects an enemy may also become an instrument of indiscriminate violence. The exposer’s righteousness is not established merely by his success in exposing.

Veiled Speech as Divine Teaching: Matthew 13:10–13

When the disciples asked Jesus Christ why He spoke to the multitudes in parables, He answered: “Because it is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given. For whosoever hath, to him shall be given, and he shall have more abundance: but whosoever hath not, from him shall be taken away even that he hath. Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand” (Matthew 13:11–13).

This passage establishes beyond dispute that veiled speech is not inherently sinful. Jesus Christ Himself spoke in a manner that conveyed meaning to some hearers and withheld it from others. The parables share several mechanical features with concealment languages: they employ figurative systems, they operate through semantic overlay in which ordinary stories carry hidden meanings, and they distinguish insiders who receive the interpretation from outsiders who do not. If mechanism alone determined moral character, the parables would stand condemned with the thieves’ cant. They do not, and the reason confirms the distinction drawn in the third section between mechanism and moral evaluation.

The parables differ from guilty concealment in what they hide, from whom, and to what end. They do not hide evil but truth. They do not withhold it from a rightful judge but from those who have hardened themselves against it, so that the veiling is itself a just judgment upon a refusal to see. And they do not aim at permanent concealment, since the explanation was given to the disciples (Matthew 13:18–23, 36–43), and the mystery hidden from ages was later made manifest and proclaimed to all nations (Romans 16:25–26; Colossians 1:26). The parables veil in order finally to reveal. This pattern stands in direct contrast to the love of darkness described in John 3, which hides in order never to be revealed.

The passage also confirms the scriptural statement that it is the glory of God to conceal a thing (Proverbs 25:2). Divine concealment is an exercise of sovereign wisdom and justice, not an evasion of judgment, since there is no higher judge from whom God could hide. Human concealment can share in this righteousness only to the degree that it hides what is good from those who would destroy it, or withholds what others have no right to demand, and never when it hides evil from rightful reproof.

Honorable Veiled Speech: The Song of Solomon

The Song of Solomon stands in this suite as a deliberate counterexample. It is the most sustained body of veiled speech in Scripture concerning love between a man and a woman, and it is honorable throughout. The study of “secret love” has been narrowed, as the first section showed, to a single category and a single moral posture. The Song shows that the language of love may employ every resource of figurative reserve without any taint of guilty concealment.

The Song speaks of the beloved through images of gardens, vineyards, fountains, spices, doves, and the creatures and places of the land. The bride is “a garden inclosed,” “a spring shut up, a fountain sealed” (Song of Solomon 4:12). These figures veil the intimacies of covenant love in a manner that any attentive reader can understand but that never descends into crude statement. In the terms of the third section, this is discretion rather than concealment. The meaning is not hidden from those with a right to know it; the reserve lies in the manner of speaking. The enclosure of the garden is not the secrecy of a liaison but the exclusive belonging of a bride to her husband.

The Song also contains a repeated charge to the daughters of Jerusalem not to stir up nor awaken love until it please (Song of Solomon 2:7; 3:5; 8:4). This is restraint of a different kind: not concealment of a forbidden attachment, but the guarding of love until its proper time. It teaches that some reserve in matters of love is not a refuge for sin but a protection of what is good.

Most tellingly, the Song expresses a desire for openness rather than concealment. The bride wishes that her beloved were as her brother, so that she might find him outside and kiss him and not be despised (Song of Solomon 8:1). The constraint she feels is not the constraint of guilt but of public custom, and her longing is for a love that can be acknowledged openly. The Song includes a public wedding procession in which the king is crowned in the day of his espousals and the day of the gladness of his heart (Song of Solomon 3:6–11). Honorable love moves toward public acknowledgment, while guilty love, like the adulterer of Job 24, waits for twilight and says that no eye shall see.

The Song thus provides the field with its clearest test case for distinguishing the veiled speech of righteous love from the coded speech of forbidden attachment. Both may use figurative language, private meaning, and reserve before outsiders. What separates them is whether the love itself is lawful, whether the reserve is discretion or deception, and whether the disposition of the lovers is toward the light or away from it.

Principles for the Suite

From these passages the suite draws the following principles for the moral evaluation of concealment languages.

First, guilty concealment arises from love of darkness. Where the matter concealed is sin, the impulse to hide it is an evasion of reproof and an expression of the heart’s condition, not merely a response to circumstance (John 3:19–20; Job 24:13–17).

Second, secrecy can corrupt by its own appeal. The hidden quality of a forbidden act may become part of its attraction, and the code that shelters it may be valued for the sweetness of secrecy itself, while also hiding the act’s consequences from the one who pursues it (Proverbs 9:17–18).

Third, the renaming of evil is itself sinful. A concealment language that habitually calls evil good corrupts the moral vision of its users, and it is to be judged by what it renames as well as by what it hides (Isaiah 5:20).

Fourth, no concealment succeeds against God. Every code relies on the presumption that what no human eye sees is unseen, and that presumption is false (Isaiah 29:15; Psalm 139:11–12).

Fifth, all concealment is temporary. Whatever is hidden will be revealed, and the lifecycle of every concealment language ends in final disclosure, which condemns the guilty and vindicates the righteous (Luke 12:2–7).

Sixth, the exposure of evil is a duty, but it has limits. Believers are to reprove the works of darkness and bring them into the light, but it is a shame even to speak of what is done in secret, and exposure must not become a vehicle for the evil it reveals (Ephesians 5:11–13).

Seventh, the devices of exposure are morally neutral in mechanism. Recognition tests and other instruments of detection may serve justice or injustice, and the exposer’s success does not establish his righteousness (Judges 12:5–6).

Eighth, veiled speech is not inherently sinful. God Himself conceals, and Jesus Christ taught in parables that withheld meaning from the hardened while revealing it to His disciples. The moral character of veiled speech depends on what it hides, from whom, and to what end (Matthew 13:10–13; Proverbs 25:2).

Ninth, honorable love may speak with reserve. The Song of Solomon shows that the language of lawful love may use every resource of figurative discretion while remaining wholly righteous, and that such love moves toward acknowledgment rather than away from it.

These principles correspond to the distinctions set out in the third section and give them their moral content. The guilty concealer hides sin from rightful reproof; the persecuted concealer hides what is good from unjust power; the competitive concealer guards an advantage whose rightness depends on how it was gained and used; and the honorable speaker exercises discretion without deception. With the standard of judgment established, the prolegomenon turns to the method by which the suite will hold together the descriptive disciplines and this moral theology, and to the limits of what each can establish.

7. Method and Scope

The preceding sections have joined the fragments of a divided field under a single principle, drawn the distinctions needed to compare its cases, established rules for handling its evidence, provided a common descriptive vocabulary, and set out the scriptural standard by which its subject is judged. What remains is to state how the work of the suite will actually be done. The study of concealment languages draws on four bodies of method: comparative lexicography, sociolinguistics, institutional analysis, and biblical moral theology. Each is necessary, and none is sufficient. Each can establish certain things with confidence and cannot establish others at all. This section describes what each method contributes, states the limits of each explicitly, explains how they are held together, and defines the scope of the suite’s inquiry.

Comparative Lexicography

Comparative lexicography is the study of the words themselves: their attestation, their dates and places of use, their forms, their meanings, their sources, and their movement between languages. It is the foundation of the field because concealment languages survive chiefly as vocabularies, and nearly every other inquiry depends on establishing first which words were used, by whom, when, and in what sense.

Lexicography can establish that a term is attested in a particular source, and, by applying the rules of the fourth section, whether that attestation is independent or derived. It can establish the earliest and latest known dates of a term’s use, the regions in which it appears, and the senses in which it was recorded. It can trace patterns of borrowing, showing that a term passed from Romani or Yiddish or Italian into a particular underground vocabulary, or from one concealment language into another. It can identify the mechanisms of formation described in the fifth section, showing that a given vocabulary relies heavily on inversion, rhyme, overlay, or borrowing. And it can reveal connections between languages that the narrowed disciplines kept apart, demonstrating through shared words that communities studied separately were in fact in contact.

Lexicography cannot establish how often a term was used, how widely it was known within a community, or how central it was to the community’s speech. A word recorded once may have been in daily use or may have been a passing coinage. It cannot establish the intentions of speakers, since a glossary records what a word meant, not why someone chose to use it. It cannot reconstruct the size or structure of the community that spoke a language. It cannot establish the moral character of what a vocabulary concealed. And because it depends on the exposer’s archive, it cannot prove the absence of a term or a language from any community, since absence from the record may reflect only successful concealment or the lack of an observer. Lexicography tells the field what was said; it does not by itself tell the field what the saying meant for those who said it.

Sociolinguistics

Sociolinguistics is the study of language in relation to the communities that use it: who speaks, to whom, in what settings, with what variations, and with what social effects. It supplies what lexicography lacks by placing vocabularies within the networks of people who used them.

Sociolinguistics can establish, where evidence permits, the composition of a speech community and the patterns of contact among its members, which bear directly on the driver of density described in the second section. It can identify variation within a concealment language, showing that different subgroups, regions, or generations used it differently. It can describe the functions set out in the fifth section, particularly recognition, solidarity, transmission, and display, which concern the social life of a language rather than its vocabulary alone. It can trace how a language was learned and passed on, and how it changed as its community changed. Where living speakers or recent records exist, it can observe a concealment language in use rather than only in its recorded fragments.

Sociolinguistics faces severe limits when applied to historical cases. Its methods were developed largely for the study of living communities through direct observation, interviews, and recordings, and the historical record of concealment languages rarely supplies evidence of that kind. Reconstruction of past speech communities from scattered legal testimony, satirical portrayals, and glossaries must remain tentative, and the scholar must resist the temptation to fill gaps with assumptions drawn from modern communities that may not resemble historical ones. Sociolinguistics also cannot establish moral character. It can describe what a language did for its speakers, but whether that service was righteous depends on what was concealed and from whom, which lies outside its competence. Finally, where sociolinguistic study involves living communities, the observer may alter what he observes, and speakers who guard a code have every reason to mislead an outside investigator, as the fourth section noted of earlier collectors.

Institutional Analysis

Institutional analysis is the study of the bodies that produce the pressures under which concealment languages arise and the means by which they are exposed: courts, legislatures, police, churches, inquisitions, guilds, families, armies, prisons, markets, and states. It explains the conditions behind the drivers of pressure, density, and duration, and it explains how the exposer’s archive came to be formed.

Institutional analysis can establish the sources and severity of pressure on a community: what laws forbade, what penalties were imposed, how vigorously enforcement was pursued, and how social or religious sanctions operated alongside legal ones. It can explain density by showing how institutions gathered people together, as prisons, workhouses, fairs, armies, and ports concentrated those who shared a secret and gave their speech the conditions for elaboration. It can explain duration by tracing how long a pressure persisted and what changes in law or custom eventually removed it. It can account for the shape of the archive by showing why particular courts kept particular records, why certain kinds of offenders drew more attention than others, and why lexicographers and satirists turned to certain subjects in certain periods. It can show how the institutions of exposure and the communities of concealment shaped one another over time, each responding to the other’s methods.

Institutional analysis cannot explain individual choice. It can show the conditions under which people concealed, but it cannot show why one person under a given pressure chose concealment while another chose confession, flight, or abandonment of the hidden matter. The second section insisted that the governing principle is not deterministic, and institutional analysis must respect the same limit. More important, institutional analysis cannot establish whether an institution’s pressure was just. Legality is not righteousness. Scripture affirms that civil authority is ordained of God and bears the sword against evildoers (Romans 13:1–4), and it equally records that the apostles answered the council that they ought to obey God rather than men (Acts 5:29). An institution that suppressed thieves and an institution that suppressed faithful worship may have used identical methods, and institutional analysis alone cannot tell the difference. That judgment belongs to the fourth method.

Biblical Moral Theology

Biblical moral theology is the application of the teaching of Scripture to the moral questions the subject raises. It supplies the standard set out in the sixth section and the means of applying it to particular cases.

Biblical moral theology can establish the moral character of the types of concealment described in the third section: that the concealment of sin from rightful reproof is guilty, that the hiding of what is good from unjust power may be righteous, that the guarding of honest advantage is permissible, and that discretion without deception is honorable. It can establish the duties that fall upon those who encounter works of darkness, including the duty of exposure and its limits. It can identify forms of corruption internal to concealment languages, such as the renaming of evil as good, which the descriptive methods would record without judging. And it can establish the final horizon within which all concealment stands: the knowledge of God from whom nothing is hidden and the certainty that what is spoken in darkness will be heard in the light.

Biblical moral theology cannot supply historical facts that the evidence does not contain. Scripture does not provide a lexicon of Rotwelsch, a census of Elizabethan vagrants, or the motives of a particular informer. It must not be used to fill gaps in the historical record, to presume guilt where the evidence is silent, or to presume innocence because a community was persecuted. Its application depends entirely on the accuracy of the facts to which it is applied. Proverbs warns that he who answers a matter before he hears it, it is folly and shame to him (Proverbs 18:13). A moral judgment rendered on a case that has not been accurately described is not a righteous judgment, however sound the principle behind it. Biblical moral theology also cannot, by itself, determine the precise moral standing of every party in every case, since particular situations often mix guilt, persecution, and competition in ways that require careful discernment rather than the mechanical application of categories.

Holding the Methods Together

The four methods are held together by an order of operations and by a discipline of mutual correction.

The order of operations follows the distinction between mechanism and moral evaluation set out in the third section. Lexicography first establishes what words and signs are attested and how securely. Sociolinguistics then places them within the community that used them, describing its structure, its contacts, and the functions its language served. Institutional analysis then identifies the pressures that produced the language and the means by which it was exposed. From these three, the scholar constructs the concealment profile described in the fifth section, locating the case on all four axes and stating the drivers that shaped it. Only then does biblical moral theology render judgment, determining the type of concealer and the moral character of the concealment. Description precedes evaluation, so that judgment rests on the most accurate account the evidence allows.

The discipline of mutual correction means that each method checks the others. Lexical evidence may overturn a sociolinguistic reconstruction that assumed contact or separation between communities. Institutional analysis may show that a vocabulary attributed to criminals was in fact recorded by a court persecuting a religious minority, changing both its sociolinguistic interpretation and its moral evaluation. Biblical moral theology may direct attention to features the descriptive methods would overlook, such as the moral significance of renaming, the appeal of secrecy for its own sake, or the hypocrisy concealed within respectable speech. The theological standard shapes the questions the field asks without dictating the answers the evidence gives.

Two errors must be avoided. The first is reductionism, in which moral theology is dissolved into description, so that the scholar records what concealment languages did without ever asking whether they should have done it. This was the error of the dialectological and cryptographic traditions. The second is moralism, in which description is bent to serve a verdict reached in advance, so that the evidence is selected and interpreted to confirm a judgment of guilt or innocence. This was the error of many exposers and of some sympathetic modern scholars. The order of operations guards against moralism; the insistence that evaluation is not optional guards against reductionism.

Degrees of Confidence

Because the evidence is uneven, the suite distinguishes four degrees of confidence and states them explicitly. A claim is established when it rests on independent attestations that agree and are free of the distortions identified in the fourth section. A claim is probable when the evidence favors it but rests on a single good source or on sources that share some interest or channel. A claim is possible when the evidence permits it but does not favor it over alternatives. A matter is unknown when the evidence does not bear on it. Moral judgments are rendered with a confidence that matches the confidence of the facts on which they rest. Where the facts are only probable, the judgment is stated as conditional upon them.

Scope

The scope of the suite is defined by the governing principle. It includes any form of speech or signaling that meets both conditions set out in the second section: the matter could not be admitted, and it nonetheless had to be communicated. This includes dyadic codes and communal languages, guilty, persecuted, and competitive concealment, and concealment practiced in respectable as well as notorious settings, since Jesus Christ’s warning against hypocrisy extends the field into the hidden speech of ordinary religious and social life (Luke 12:1–3).

The suite treats privacy and discretion as comparative cases rather than primary subjects. They appear where they illuminate concealment by contrast, as the Song of Solomon does in the sixth section, but they are not themselves forms of concealment and are not studied as such. Occupational and regional jargons that never served a concealing function fall outside the suite except where they represent the afterlife of a former concealment language or where they shared vocabulary with one. Designed cryptography appears where it was used by human communities to conceal and where its mechanisms illuminate those of informal codes, but the technical history of ciphers for their own sake belongs to its own discipline.

The geographical and temporal range of the suite is set by the evidence. The exposer’s archive is richest for Scripture, for the European and Anglophone world from the late medieval period onward, and for communities that came before courts or attracted lexicographers. The suite’s cases are weighted accordingly. This weighting reflects the condition of the record, not a judgment that concealment languages elsewhere were fewer or less important, and wherever the suite generalizes, it does so with that limit stated.

Limits of Conduct

Finally, the suite observes limits drawn from the scriptural standard itself. It is a shame even to speak of the things done in secret (Ephesians 5:12), and the study must not become a means of spreading what it describes. The suite therefore reproduces vocabulary and describes mechanisms in the measure needed for comparison, profile, and judgment, and declines to supply operational detail that would instruct readers in the practice of evil. Where a concealment language remains in use by a living community that conceals what is good from unjust power, the suite does not publish details that would aid its persecutors. And where a case touches living individuals, the suite does not expose them by name beyond what the public record has already made known.

With its method and scope defined, the prolegomenon has completed its foundational work. It remains only to show how the specialized studies of the suite fit together and in what order they are best read.

8. A Map of the Suite

The prolegomenon has set the boundaries of the field, stated its governing principle, drawn its distinctions, established its rules of evidence, supplied its descriptive vocabulary, grounded its moral judgments in Scripture, and defined its method and scope. It now remains to show how the works that follow fit together. The suite, gathered under the title Speech Under Cover: Underground Languages, Hidden Deeds, and the Moral Ecology of Concealment, is arranged in layers. The founding white paper and this prolegomenon establish the framework. A series of white papers applies it to particular domains. Seven monographs carry the full scholarly weight. Six diagnostic instruments make the framework usable in institutions and in personal examination. Five policy manuals translate it into organizational practice. A set of reference and teaching materials completes the collection. This section describes each layer, shows how its works draw on the foundations laid here, and recommends an order of reading.

The Founding Paper and the Prolegomenon

The suite began with the white paper Hidden Deeds, Hidden Tongues, which argued that secret loves and secret trades belong to a single family of concealment speech and that the scholarship confining “secret love” to one category had missed that kinship. The prolegomenon stands beside that paper as its systematic counterpart. Where the founding paper made the case through historical examples, the prolegomenon supplies the principle, distinctions, vocabulary, and method by which every later work is to proceed. The two are best read together at the outset: the white paper shows why the field must be joined, and the prolegomenon shows how.

The White Papers

The white papers are short, argument-driven, and written in the third person. Each takes up one portion of the field and examines it through the four axes set out in the fifth section. Read as a group, they cover the field from several directions at once: by function, by mechanism, by object, by stage of the lifecycle, and by social setting.

Moral Anesthesia: How Euphemism Shelters the Conscience takes up the corruption identified in the sixth section under Isaiah 5:20, the renaming of evil as good. It follows the function by which a concealment language dulls the conscience of its own speakers, and it carries the analysis from the thieves’ vocabulary into the softened language of respectable institutions.

The Informer’s Dictionary: Exposure, Codification, and the Death of Secret Speech addresses the exposure stage of the lifecycle and extends the fourth section’s treatment of the exposer’s archive. Its case studies in Harman, Greene, Grose, and Round the Horne show why the recording of a secret language usually ends its usefulness, and what this implies for modern investigators and journalists.

The Shibboleth Problem: Recognition Language and the Boundaries of Belonging takes Judges 12 as its archetype and examines the recognition devices described among the mechanisms of the fifth section. It shows how underground groups test membership and how mainstream institutions, including churches, do the same through their own insider vocabularies.

Twilight Correspondence: The Private Codes of Adultery and Clandestine Courtship restores the neglected strand that the first section identified as missing from the narrowed field. It treats desire and attachment as objects of concealment across the full range of illicit love, chiefly through dyadic codes.

Mysteries of the Trade: Guild Secrecy, Trade Jargon, and Legitimate Discretion examines the competitive concealer defined in the third section. It asks where honest trade privacy ends and deception of the customer begins.

Speaking Guardedly Under Persecution examines the persecuted concealer, applying careful source criticism to popular claims about the coded speech of believers and dissenters under hostile authority and distinguishing concealment forced by injustice from concealment chosen to hide wrong.

The Tavern, the Fair, and the Prison: Shared Spaces and Shared Argots develops the driver of density from the second section, showing how the places where outlawed populations met allowed their languages to mix.

When Openness Comes: What the Death of a Secret Language Reveals About a Society treats the decline stage of the lifecycle. It argues that the relaxing of concealment reveals a change in public standards but says nothing in itself about the righteousness of the deed once concealed, which must still be judged by Scripture.

Digital Cant: Emoji Codes, Algospeak, and the New Underground carries the framework into present-day concealment on electronic platforms. In keeping with the limits of conduct set out in the seventh section, it is written at the level of pattern for institutional awareness and not as a guide to decoding.

The Monographs

The seven monographs give book-length treatment to subjects that the white papers can only open. Two of them serve as anchors for the rest, one theoretical and one theological; the remaining five are historical.

Anti-Languages: A Comparative Grammar of Concealment is the theoretical anchor. It builds on and reconsiders Halliday’s concept of the anti-language and develops into full form the mechanisms, functions, and lifecycle sketched in the second and fifth sections of the prolegomenon, concluding with a general theory of concealment speech.

What Is Done in Secret: A Biblical Theology of Concealment and Exposure is the theological anchor. It expands the sixth section into a sustained study of the scriptural record, from the first hiding in Eden through Achan, David, Ezekiel’s chambers of imagery, Job’s twilight watchers, Isaiah’s woe, the light and darkness of John’s Gospel, the parables, and Ananias and Sapphira, to honorable privacy and the final exposure in which nothing hid shall remain unknown.

The Canting Crew: Thieves’ Cant and the English Underworld, 1500–1900 traces the English tradition from the Tudor fear of the masterless man through the canting dictionaries, the stage and ballad, transportation to the colonies, and the leakage of cant into slang, and closes by asking what the moral vocabulary of that anti-society reveals.

Stolen Waters: The Languages of Illicit Love from Ovid to the Smartphone takes its title from Proverbs 9:17 and gives the full historical treatment that Twilight Correspondence introduces, setting the twentieth-century argots studied by lavender linguistics in comparative perspective within the much longer history of concealed love and closing with a biblicist reading.

Mysteries of the Road: Itinerant Trades and Their Private Tongues studies the languages of travellers, showmen, peddlers, and street traders, including Shelta, Parlyaree, carnival talk, backslang, and the Russian peddlers’ Ofenya, with attention to the line between trade secrecy and the deception of customers.

Rotwelsch, Bargoens, and Argot: The Continental Underworlds carries the inquiry beyond England, from the Liber Vagatorum and Luther’s preface through the Low Countries, Villon and the Coquillards, Hugo’s argot, the Atlantic transfer to Buenos Aires in Lunfardo, and modern inversion in Verlan, and compares the continental cants with the English.

The Informer’s Pen: Exposure Literature and the Making of the Underworld Archive is the historiographical study that extends the fourth section of the prolegomenon into a full account of how concealed communities have been known through magistrates, pamphleteers, police memoirists, social investigators, journalists, and broadcasters, and of what each type of exposer added, distorted, or invented.

The Diagnostic Instruments

The six diagnostic instruments turn the framework into tools for use. Each includes scoring guidance, notes on interpretation, and stated limits on use. The Institutional Euphemism Audit applies the analysis of renaming to an organization’s own vocabulary. The Concealment Pressure Assessment measures the three drivers of the second section within an organization or subgroup to anticipate where hidden speech is likely to form. The Insider-Language Health Check applies the shibboleth problem to churches, clubs, and professional bodies, testing whether their jargon serves fellowship and precision or has come to exclude newcomers and shield leaders from scrutiny. The Self-Examination Inventory: Speech and Conscience turns the inquiry inward, grounded in 2 Corinthians 13:5 and Psalm 139:23–24. The Source-Reliability Rubric for Underground Lexicons converts the rules of source criticism from the fourth section into a scholarly grading tool. The Discretion–Concealment Discriminator applies the distinctions of the third section as a structured series of questions separating legitimate privacy from the concealment of wrongdoing.

The Policy Manuals

The five policy manuals translate the framework into organizational practice for bodies that must respond to hidden speech without overreacting to ordinary jargon. The Communications Integrity Policy Manual sets standards of plain naming for businesses and nonprofits. The Congregational Speech and Accountability Manual guides churches in distinguishing pastoral confidentiality from concealment and in applying Matthew 18:15–17 when hidden conduct comes to light. The Child and Youth Protection Communications Manual gives schools, churches, and youth programs pattern-level awareness, reporting duties, and supervision practices, and deliberately avoids any lexicon of exploitative terms, in keeping with the limits of the seventh section. The Investigative and Archival Handling Manual addresses privacy, verification, and responsible publication for those who work with records of underground language. The Workplace Fraud Detection: Language Indicators Manual equips auditors and compliance officers to recognize coded vocabulary in fraud and to escalate appropriately.

Supporting Materials

The supporting materials serve as the reference and teaching layer of the suite. A Comparative Lexicon of Historical Underground Languages gathers historical terms with their sources and reliability grades, limited to historical material. A Sourcebook of Primary Texts provides annotated excerpts from public-domain sources, allowing readers to examine the exposer’s archive directly. The sermon series Works of Darkness, Children of Light carries the scriptural foundations into the pulpit in six sermons: “Hiding in the Garden,” “Stolen Waters,” “Calling Evil Good,” “Chambers of Imagery,” “Walking as Children of Light,” and “Nothing Covered.” A Study Guide for Small Groups pairs scriptural texts with historical cases across eight sessions and incorporates the Self-Examination Inventory. A series of shorter essays suitable for Edge Induced Cohesion takes one language, case, or concept at a time and connects it to the larger argument.

The Recommended Order of Reading

The works are best read in the order in which they build upon one another.

The prolegomenon and Hidden Deeds, Hidden Tongues come first, since every later work assumes the framework they establish.

The white papers Moral Anesthesia, The Informer’s Dictionary, The Shibboleth Problem, and Twilight Correspondence follow, carrying the argument across function, stage, mechanism, and object and demonstrating that the framework holds in each direction.

Anti-Languages and What Is Done in Secret come next as the theoretical and theological anchors. They are best read together, since the first develops the descriptive analysis and the second the standard of judgment, and the method of the seventh section requires that both be held in view.

The historical monographs follow: The Canting Crew, Stolen Waters, Mysteries of the Road, Rotwelsch, Bargoens, and Argot, and The Informer’s Pen. Each tests the framework against an extended body of evidence, and the last turns back upon the evidence itself.

The diagnostic instruments and policy manuals come after the scholarship on which they draw, so that their practical recommendations rest on established findings rather than preceding them.

The lexicon, sourcebook, sermon series, and study guide close the suite as its reference and teaching layer, making its findings available to scholars, congregations, and general readers.

The remaining white papers, Mysteries of the Trade, Speaking Guardedly Under Persecution, The Tavern, the Fair, and the Prison, When Openness Comes, and Digital Cant, may be read alongside the monographs whose subjects they introduce, each serving as a brief entry point into the larger treatment.

Conclusion

The suite as a whole moves from foundation to application, as Scripture itself moves from the exposure of hidden things to the call to walk as children of light (Ephesians 5:8–13). It begins by restoring the field to its proper breadth, describes the phenomenon with care, judges it by a standard that neither the concealer nor the exposer may set for himself, and ends by equipping institutions and individuals to discern what their own speech conceals. Its aim is not merely to catalogue the languages of hidden deeds but to understand them truthfully and to judge them rightly, in the knowledge that there is nothing covered that shall not be revealed, and that the one who does truth comes to the light.