To do this trick you must lay a wager that you will tell the card the
person has touched, though you do not see it. Let several cards be laid
out on a table, 1, 2, 3, 4, 5, 6, or any number, then turn your back, or
leave the room while the person makes choice; on your return you must
inquire what he will lay, having your eye upon the cards laid out: if he
says he will lay six to one, or ten to one, you must take the highest
number, as that will, in all probability, be the card he had fixed on.
You must seem to pause about counting the cards as they lay and choosing
the farthest off.