American inventor (1837–1920) responsible for the manufacturing of celluloid, the first industrial plastic. ALS, one page, 8.5 x 5.5, personal letterhead, October 22, 1909. In a brief letter to Miss Straus, Hyatt writes, in full: “I have the pleasure of complying with your request.” In very good condition, with a central horizontal fold, light creasing, one of which slightly affects the first letter of the signature, show-through from mounting remnants on the reverse, a small biographic clipping affixed towards the bottom left corner, and a trimmed bottom edge. RRAuction COA.
