Paul Curry marketed “Out of This World,” 1942.

For plot precursors, see Reinhard Müller's article in Underworld, No. 1, 1996, p. 4. Also in The Fine Print, No. 4, Feb. 1997, p. 89. F. W. Conradi offered two methods in Der Moderne Kartenküstler, 1896, p. 110. His second used corner crimps to distinguish the red cards from the black.

• Category in Denis Behr's "Conjuring Archive"