Blackstone, Harry (Henry Boughton). Blackstone?s Secrets of Magic [Signed Twice]. New York: George Sully and Co., 1929. First edition. Publisher?s pictorial cloth stamped in black and white. Inscribed and signed twice, on different occasions and to separate owners, with a caricature portrait on the front pastedown, inscribed: ?To Bob A./ May you enjoy this effort of mine. Harry Blackstone/ 1/23/1931.? And on the opposite flyleaf: ?Hi ya, Rex/Harry Blackstone/2/27/1947.? Illustrated. 8vo. Light soiling and wear on spine, else very good.