Note 18 — Chapter VIII

Note 18.—On Conversing and Corresponding by means of Signs, Emblems, Metaphors, &c. Many persons of the instructed classes, and some others, among the Arabs, often take delight, and shew much ingenuity and quickness of apprehension, in conversing and corresponding by means of signs, emblems, &c., or in a conventional, metaphorical, language, not understood by the vulgar in general, and sometimes not by any except the parties engaged in the intercourse. In some cases, when the main metaphor employed is understood, the rest of the conversation becomes easily intelligible without any previous explanation; and I have occasionally succeeded in carrying on a conversation of this kind (though not in cases such as that described in the tale referred to by this note); but I have more frequently been unsuccessful in attempting to divine the nature of a topic in which other persons were engaged. One simple mode of secret conversation or correspondence is by substituting certain letters for other letters.