WALTER KEITH ARMISTEAD - (1785-1845) - Army Engineer, born in Virginia. Graduated at West Point (1803), served as superintending engineer of the Norfolk, Va., defences (1808-11), assigned to Niagra frontier as Chief engineer on outbreak of War of 1812. Served as superintending engineer of the defences of Chesapeake Bay (1814-18), appointed chief of Engineers, and inspector of West Point (1818-21). Served in the war against the Seminole Indians.