Thus prepared, you request a party to think of a card, and then you tell him to touch any number he pleases, requesting him to name it aloud. Then, adding the whole number of the cards to the number touched, you tell him to count backwards to himself, beginning with the card touched, and giving to that card the number of the one thought of. By counting in this way, the party will at length count the entire number on the card thought of, which you will thus be able to designate with certainty.

Example:—Suppose the card thought of is G, marking 7; again, supposing the one touched to be D, equal to 4; you add to this number the entire number of cards, which is, in this case, 10, which will make 14. Then, making the party count this sum, from the number touched, D to C, B, A, and so on, backwards, so that in commencing to count the number thought of, 7 on D, the party will continue, saying, 8 on C, 9 on B, 10 on A, 11 on K, 12 on I, 13 on H, and end with counting 14 on G; and you will thus discover that the number thought of is 7, which corresponds to G.

Of course the party counts TO himself, and only speaks to designate the point on which he stops, namely, G in this example.

This trick may be performed with any number of cards—as few as six, or as many as fifteen. Then you must always add to the number the total of the cards used. The trick will be much more interesting and striking if you turn the cards face downwards, only trusting to your memory to retain the order of the numbers.

Of course, the letters are only used to facilitate the explanation. The cards really form a sort of circle, beginning at 1 or the ace on the left, and then continuing with the 2, the 3, the 4, the 5, and so on, to the 10 below the ace; and, by necessity, the party must end his counting with the very card he thought of, beginning from the one he happens to point out.

13. The card that cannot be found.

Take any number of cards and spread them out fan-like in your hand, faces fronting the spectators.

Ask one of them to select a card. You tell him to take it, and then to place it at the bottom of the pack. You hold up the pack, so that the spectators may see that the card is really at the bottom. Suppose this card is the king of hearts.

Then, pretending to take that card, you take the card preceding it, and place it at a point corresponding to A in the following figure.

A C
B D