Architect (1759–1828) who designed the U. S. Capitol and later served as the first superintendent of the Patent Office. Endorsement signed “William Thornton,” July 31, 1821, at the conclusion of a manuscript deed of trust between a husband and wife. Thornton signs beneath a witness statement in another hand which reads, in part: “Personally appeared before the Subscriber one of the Justices of the Peace…& that she signed sealed & delivered the above deed.” Scattered toning, heavier along folds, tape reinforcement to hinge of second integral page, and show-through from writing on reverse, otherwise fine condition. This endorsement represents the first we’ve seen signed by the prolific architect! RRAuction COA.