He was 18 years old when he was enlisted (4).
He was a clerk when he was enlisted (4).
He was 5 feet 4 inches tall, and had a fair complexion, light eyes, and light hair (4).
He was enlisted and mustered into service on 3 October 1861 (1, 4). He was enlisted for three years, by Lieutenant Pierce, at Philadelphia, Pennsylvania (4). He served as a private in company F (1).
He was discharged at Philadelphia, Pennsylvania, on writ of habeas corpus, because he was under age (1, 3, 4). (I assume his inclusion in the company F Register of Deserters (2) is a mistake.)
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) (Edward A Cox)
2 company F, register of deserters, #10 (Edward A Cox)
3 company F, register of men discharged (Edward A Cox)
4 company F, descriptive roll, #58 (Edward A Cox)
[I did not find an entry for him in the Ancestry index to the 1890 veteran's census (searched May 2007)]