"... IN YOUR upper left waistcoat pocket have a blank card, playing-card size, and in right trousers pocket a double-faced card, AH-KD
for instance. Borrow a pack and palm the fake card on to it, AH face to show with the other faces. Run through the faces and show
there are two AH. Turn the pack over and run over the backs, showing the KD face up, i.e. the faked card. Take this out and in
pretending to put it in your waistcoat pocket, palm it and pull up the blank card already in the pocket just enough to show the white edge...."