And whilst he indicates the nature of the cards he at the same time makes known the colour by the following signs:-- 1. The mouth slightly open . . . . . Hearts. 2. The mouth shut . . . . . . . . . . Diamonds. 3. The upper-lip slightly pouting over the lower . . . . . . . Clubs. 4. The lower-lip drawn over the upper . . . . . . . . . . . Spades. Thus, if the Greek wishes to announce, for instance, the knave and ace of hearts, he successively directs his looks upon the play of his adversary, upon the stake, and to the opposite side, whilst keeping his mouth slightly open. It is evident that this telegraphy may be employed at all games where there is a gallery. In effect, nothing is easier at Piquet than to indicate, by the aid of these signals, the colour in which the player should discard and that in which he should keep what cards he has. These are the simplest signs; but some of the Greeks have a great number of them, to designate everything; and even sometimes to communicate and receive intelligence, when necessary. This telegraphy is so imperceptible that it is difficult to describe it, and altogether impossible to detect it.(7) (7) Tricheries des Grecs devoilees. Robert-Houdin has exhausted the subject of card-trickery, in connection with that prestidigitation which, it seems, all card-sharpers cultivate, the description of which, however, is by no means so entertaining as the visible performance. I find, nevertheless, in his book, under the title of 'Small Trickeries made innocent by Custom,' certain things alluded to which I can attest by experience. I. At Whist, no communication whatever must be made by a player to his partner, excepting those authorized by the laws of the game; but some persons go further, and by the play of their features 'telegraph' to their partners the value of their hands. II. Any one with a good memory and endowed with quick perception may form a very accurate estimate of the hands held by all the players by remembering THE TRICKS AS THEY ARE PLAYED AND TURNED DOWN--all of a suit, or trumped. Cards 'stick together' most lovingly, and the ordinary shuffling scarcely alters their sequence; and so, if a trick has been taken by an ace over a king, for instance, and in the next deal you get the same king, you may be sure that the ace is either on your right or your left, according to the deal; of course, if you get the ace, then the same probability, or rather necessity, exists as to the king; and so on. Knave, queen, king, ace, of the same name, are almost sure to be separated in the deal between the four players, or one player will have two of them. The observation is a tax upon the faculties; but I am sure, quite sure, that the thing can be done, and is, when done, of material service; although, of course, the knowledge can be turned to account only by an expert player, with a partner who can understand the game which he wishes to play.