He was 35 years old when he was enrolled (3, 4 [40 in 1863]).
He was a ship carpenter (3, 4). He was living in Philadelphia, Pennsylvania, when he was enrolled (3).
He was 5 feet 8-1/2 inches tall, and had a dark complexion, blue eyes, and dark hair (3, 4).
He was enlisted and mustered into service as a private on 12 October 1861, at Philadelphia, Pennsylvania (1, 2, 3). He was enlisted for three years, at Philadelphia, Pennsylvania, by Captain Bowman (2). He served as a private in company B (1).
He fought at the Battle of Gettysburg (6).
He reenlisted as a veteran volunteer on 24 December 1863, at Bealton, Virginia (1, 3, 4 [25 Dec]). He was enlisted for three years by Lieutenant Carpenter, and mustered by Lieutenant Swan (4).
He was transferred on 1 May 1864 to the US Navy (by general order, War Department) (1, 3, 5, 7).
1 Bates, Samuel Penniman. History of Pennsylvania volunteers, 1861-5. Harrisburg: B. Singerly, state printer, 1869-71. 5 volumes. 'Ninety-first regiment', volume 3, pages 186-233. (In the roster) (John Vaughen)
2 company B, descriptive roll, entry 40 (John Vaughan)
3 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 31 May 2004 (John Vaughen; rolls also have 'Vaughan')
4 company B, [second] descriptive roll, entry 31 (John Vaughan)
5 consolidated morning report, 91st Pennsylvania, 2 May 1864 (Pri Vaughn)
6 Pennsylvania Memorial, Gettysburg, Pennsylvania (John Vaughen)
7 monthly return, company B, May 1864 (John Vaughen)