This, as a sleight-of-hand feat with cards, takes precedence, for bare-faced daring, of, perhaps, any other. It consists in deliberately exchanging a card held in one hand for another in the pack held in the other hand, and this in full view of the audience. Such a feat may appear at first sight impossible, but, with a little attention and practice, it will become as easy as any other, although it will always demand some care and address in execution. There are various methods by means of which the change is effected, of which the following three are perhaps the best. For simplification of description we will suppose that the ace of diamonds is to be exchanged for the ace of clubs.