; born in Clinton, Conn.
, March 6, 1820; graduated at West Point
in 1842, remaining two years as assistant Professor
He was made brigadier-general of volunteers in September, 1861, and major-general in July, 1862.
He was chief engineer of Heintzelman
's division at the battle of Bull Run
, and in
the Port Royal expedition
he commanded a brigade.
In February, 1862, he was in the expedition that captured Fernandina, Fla.
, and commanded a division in the attack on Secessionville, S. C.
, in June, 1862.
In July he was assigned to the Department of the Ohio, and commanded the 1st Division, 6th Corps, in the Army of the Potomac at Gettysburg
After General Sedgwick
's death he was in command of the 6th Corps, which he led in the Richmond
campaign until July, 1864, when he was sent to the defence of the national capital, and afterwards (August to December) was engaged in the Shenandoah
He was wounded in the battle
of Cedar Creek
; was in the final military operations which ended with the surrender of Lee
. He was brevetted major-general, United States army, in March, 1865; promoted brigadier-general and chief of engineers June 30, 1879; and was retired March 6, 1884.
He died in Washington, D. C.
, July 2, 1899.