Daily Times [Leavenworth, Ks], August 1, 1861
The Capt. McCook who was killed at the battle of Bull’s Run, on Sunday, 21st of July, at the age of eighteen years, was Charles McCook, son of Judge McCook, now of Illinois. His family have distinguished themselves in the public service. His brother, G. W. McCook, of Ohio, was Lieut. Col. in Col. Curtis’, (now of Iowa,) Ohio regiment of volunteers, and served with distinction during the Mexican war. Two brothers are now Colonels in the Federal service in Virginia, one in Eastern and one in Western Virginia. The deceased was a brother of the Hon. Dan. McCook of this city–Probate Judge of this county, and Capt. of a company now in service in Missouri.
Young McCook died bravely. He had been visiting the hospital, and while crossing a field his troops were assailed by a band of horsemen who demanded a surrender. He refused, when one of the horsemen shot him. The soldier who killed him was immediately shot by one of the comrades of the deceased.