All have dates of March, April or May 1931. The images are of Alexander Herrmann, Howard Thurston, Ching Ling Foo, Robert Houdin, Harry Houdini, J.W. Elliott MD, Okito – Theo. Bamberg, Gus Fowler, Carl Rosini, Carl Hertz, Frederick Eugene Powell, T. Nelson Downs, Harry Rouclere, Karl Herrmann, Wizard Jacobs, Wyman The Wizard, MacAlister, J.N. Maskelyne, Jonathan Harrington, Robert Heller, Antonio Blitz, Imro Fox, Buatier De Kolta, Servais Le Roy, William E. Robinson (Ching [sic] Ling Soo).