HOUDINI, Harry (Erik Weisz, 1874 – 1926). Signed Houdini Letter Regarding Spirit Photography. Dated May 16, 1924, Houdini writes on his half-size letterhead to Betty Ross of Washington, D.C.: “Sent you my book, ‘A Magician Among the Spirits' this morning. Dr. W.M. Keeler, the spirit photographer's address is … Please make careful notes of everything that takes place and what is said, immediately." One corner clipped, right side thinned. SIGNED in ink, “Houdini."