Hold the pack, with the ace of clubs on the top, in the left hand, between the first finger and thumb. The other fingers should be so disposed under the pack as to leave a space between the first and middle fingers. This space, is for the reception of the card to be exchanged, in this instance the ace of diamonds, which is held between the first and middle finger of the right hand. To effect the change, bring the hands momentarily together, and place the ace of diamonds between the first and middle fingers of the left hand; the thumb and first finger of the right hand taking, at the same time, the ace of clubs from off the top of the pack. Just before executing the change, the thumb of the left hand should push the ace of clubs slightly off the pack, so that it may be in a favourable position for the finger and thumb of the right hand to seize. The action must, of course, be instantaneous and unaccompanied by the slightest hesitation or bungling. There must also be an auxiliary movement of the body from right to left, without which it is exceedingly difficult, if not impossible, to execute the change unperceived. The left hand must also be taken away from the other, at the same moment, the feat being practised until it can be accomplished in one movement, the hands not dwelling together for the most infinitesimal period of time. The learner should first practise by saying to himself, "Now here I have the ace of diamonds, and, by simply rubbing it on this table" (here give the body a half turn from right to left, and execute change), "I will transform it into the ace of clubs." This form of address should be used when exhibiting the change in this its most simple form before spectators. The chief principle to be engrafted on the mind is, that the first half of the change is performed with the right hand and the second half with the left—the two movements being interwoven, as it were, with the body swing. On no account must the hands be brought suddenly together and then parted as if something had been snatched away. This method is the one in general use, and, for ordinary purposes, I can scarcely recommend any other. By its means, it is as easy to exchange two, three, or more cards for others as a single card. The cut (Fig. 36) illustrating this change shows the two hands in actual contact. It will be seen that the actions of leaving the one card and taking the other are simultaneous.