Born: January 18, 1830

Place of Birth: Cold Spring, New York

North or South: North

Other Professions: Engineering duty, Instructor at West Poin, Army Service in Engineers, writer, railroad bridge builder.

War Service Highlights: He was the chief engineer of the Army of the Potomac at Gettysburg.

Nickname: None

Died: August 8, 1882

Place of Death: Newport, Rhode Island

Interesting Facts: Exonerated in 1882 by a court of inquiry, which criticized Sheridan's actions in relieving him.