Renowned American magician (1885–1965), often billed as The Great Blackstone, who reached the peak of his popularity in the 1930s and 1940s. Blackstone business check, 8.5 x 3, filled out and signed by company manager Lon Ramsdell, payable to Harry Blackstone for $835.44, January 8, 1949, and endorsed on the reverse by the magician, "Harry Blackstone." In fine condition. Encapsulated and graded by PSA/DNA as “MINT 9.”