THE GARCIA SLIP, OR TOUR D’HOMBOURG.
You must remember the bottom card of the pack, which you hold face down in your left hand. Cover the cards with your right hand, held over them palm down, and run the cards one by one in under the right hand by means of the finger ends. One of the company is to lay his finger on any card he pleases and stop it. Let us call this one A.
On his doing so you secretly slip back the bottom card, and, opening the pack at the card A, get the bottom card up next under it. Now bring the lower portion to the top of the other, and show B as the bottom card.
The audience having fully taken note of it, you let them shuffle the cards as much as they please, for it little matters while you know what the card is.
On receiving the cards again, you spread them out on the table, face up, and readily point to the card B as if it were the card A which was really selected, but for which B was substituted.