ANY pack may be used: have it thoroughly shuffled by a spectator and in taking it back sight the bottom card. Put the pack on the table after secretly making a mark on the top card with your thumbnail. Instruct the spectators that after you leave the room some of them (any number) are to draw cards from the middle, look at them, put them on top and finally cut the pack ad lib. with complete cuts. This done you return, take the pack, run over the faces of the cards, note the previous bottom card and quietly cut it to the bottom, at the same time noting the card next below it which will be the fast of the selected cards to be replaced. Take off the top cards one by one, reversing their order, till you come to the card you marked with your nail and this gives you the number of cards chosen. Next miscall the first of these as being the card you noted next your key card. Note what it really is as you put it down, and miscall the next by its name and so on up to the last card.