[SENECA INDIAN TREATY]. An Act, for holding a Treaty with the Seneca Nation of Indians, and for establishing a Military Post near Lake-Erie. New York, n.d. [1802]. Broadside slip bill, folio (349 x 222 mm), old folds, contemporary notation on verso. In 1802, a treaty was enacted which extinguished the Seneca Indians? claim to an area near Lake Erie, known as Black Rock. The planned fort was never built, but a smaller one was erected in 1807 and became Fort Tomkins in August 1812, also known as Fort Adams.