Many persons of the instructed classes, and some others among the Arabs, often take delight and show much ingenuity and quickness of apprehension in conversing and corresponding by means of signs and emblems, or in a conventional, metaphorical language, not understood by the vulgar in general and sometimes not by any excepting 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, 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. Many of the women are said to be adepts in this art, or science, and to convey messages, declarations of love, and the like, by means of fruits, flowers, and other emblems. The inability of numbers of women in families of the middle classes to write or read, as well as the difficulty or impossibility frequently existing of conveying written letters, may have given rise to such modes of communication. Lady Mary Wortley Montagu, in one of her charming letters from the East, has gratified our curiosity by a Turkish love-letter of this kind.[140] A specimen of one from an Arab with its answer, may be here added:--An Arab lover sent to his mistress a fan, a bunch of flowers, a silk tassel, some sugar-candy, and a piece of a chord of a musical instrument; and she returned for answer a piece of an aloe-plant, three black cumin-seeds, and a piece of a plant used in washing.[141] His communication is thus interpreted. The fan, being called "mirwaḥah," a word derived from a root which has among its meanings that of "going to any place in the evening," signified his wish to pay her an evening visit: the flowers, that the interview should be in her garden: the tassel, being called "shurrábeh," that they should have sharáb[142] (or wine): the sugar-candy, being termed "sukkar nebát," and "nebát" also signifying "we will pass the night," denoted his desire to remain in her company until the morning: and the piece of a chord, that they should be entertained by music. The interpretation of her answer is as follows. The piece of an aloe-plant, which is called "ṣabbárah" (from "ṣabr," which signifies "patience"--because it will live for many months together without water), implied that he must wait: the three black cumin-seeds explained to him that the period of delay should be three nights: and the plant used in washing informed him that she should then have gone to the bath, and would meet him.[143]