Military officer; born in
Steubenville, O., Oct. 10, 1835; another son of
Major McCook; was educated in the common schools of
New Lisbon, O.; spent several years in
California; and was admitted to the bar in 1861.
When the
Civil War broke out he entered the
Union army as a captain in the 2d Ohio Infantry; was in the
first battle of Bull Run; and on the reorganization of his regiment for three years service became colonel, and served with the Army of the Cumberland, and later in the
Atlanta campaign, becoming a brigadiergeneral.
After the war He was
United States assessor of internal revenues at
Steubenville, O., till 1873; then removed to New York City.
He was a Republican Representative in Congress in 1877-83; secretary of the United States Senate in 1887-93; and chamberlain of the
city of New York in 1893-97.