Military officer; born in
Chester county, Pa., Sept. 22, 1827; graduated at
West Point in 1849.
Entering the engineer corps, he became brigadiergeneral of volunteers Nov. 23, 1861.
He commanded a brigade under
Burnside in his operations on the
North Carolina coast early in 1862, and with him joined the Army of the Potomac.
He served in
McClellan's campaigns, and when
Burnside became its commander he was that general's chief of staff.
In the campaign against
Vicksburg he was a conspicuous actor.
He was with
Sherman, commanding the left wing of his army after the
fall of Vicksburg.
He was also engaged in the defence of
Knoxville; and in the
Richmond campaign, in 1864, he commanded the 9th Corps, and continued to do so until the surrender of
Lee, in April, 1865.
In 1865 he was brevetted major-general
U. S. A., and in 1889 was retired.