HENRY LARCOM ABBOTT - (1831-unknown) - Army Engineer, born Beverly, Essex County, Mass. Graduated at West Point (1854), assigned to duty in the office of the Pacific railroad surveys in Washingtn, D.C. Served on exploration for a railroad route between California and Oregon and (1857-1861) occupied in the hydrographic survey of the Mississippi river delta. During Civil War was chief of topographical engineers on staff of General Tyler, wounded at Battle of Bull Run, engineer on staff of General McClellan (1862), commanded siege train of both armies operating against Richmand (1864-65). Received brevets as major-general of volunteers and brigadier-general in regular army. After was engaged in construction of defensife works and commanding engineer battalion. Conducted torpedo experiments of high value and designed system of submarine mine defense at Engineer School of Application which he organized. Retired (1895), designed harbor at Manitowoe, Wis.