He was (or rather claimed to be) 19 years old when he was enlisted (3).
He was mustered into service on 28 November 1861 (1). He was enlisted for three years, at Philadelphia, Pennsylvania, by Captain Gilbert (3). He served as a private in company G (1).
On 5 December 1861, he was discharged at Philadelphia, Pennsylvania, on writ of habeas corpus (1, 2).
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 H Holmes)
2 company G, register of men discharged, #5 (Edward H Holmes)
3 company G, descriptive roll, #100 (Edward H Holmes)
[I did not find an entry for him in the index on <www.ancestry.com> to the pension index by name (searched March 2007)]