Card tricks : how to do them and sleight of hand : designed for parlor and stage entertainments for the instruction of professionals and amateurs (1902)
Roterberg, A. (August), 1867-1939 · Chicago : Frederick J. Drake & Co. · leaf 174
166 CARD TRICKS the card proper and makes a bow to the com- pany. The cards employed are constructed on the same principle, as employed in the first version of the trick, with this addition that the mechan- ical part is separable from the card proper. … In this respect they are identical with the Nonpareil Changing Card, the card proper being passed for inspection, while the trick part is kept concealed in the performer’s hand. Fig.
