BLACKSTONE Sr., Harry (1886 ? 1965). Large Collection of Blackstone Sr. Letters and Ephemera. 1920s ? 60s. Approximately 100 items, including ALSs from Blackstone Sr. on his pictorial letterhead, a SIGNED Blackstone pitchbook, a lengthy TLS from Julien Proskauer on Blackstone Magic Enterprises letterhead (two pages), many theatre programs and souvenir programs (at least one SIGNED), photographs of Blackstone (both candid and studio; some with the George Karger/PIX rubber-stamp to their versos), playbills, complimentary passes, clippings (newspaper and magazine), ticket stubs, advertising gum wrappers, one radio script of 14 pages, and much, much more. 4tos and smaller. Neatly kept in a three-ring binder. Most items in very good condition, but many with age-related wear. Several unusual items included. An impressive collection that should be seen.