He was 40 years old when he was enlisted (3).
He was enlisted and mustered into service on 26 November 1861 (1, 3). He was enlisted at Philadelphia, Pennsylvania (3). He was mustered in as a private in company KK at Philadelphia, Pennsylvania (3).
He was transferred on 24 December 1861 to company D (1, 3, 4).
He was wounded on 13 December 1862 at Fredericksburg, Virginia (1, 3).
He was discharged on 17 January 1863 on surgeon's certificate of disability, either at Convalescent Camp, Virginia, or at Carver Hospital, Washington DC (1, 2 [medical board], 3).
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) (James O'Brien)
2 company D, register of men discharged, entry 15 (James O Brien)
3 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 10 August 2004 (James O'Brien)
4 company K, list of men transferred, #14 (James Obryen [?])
[I did not find an entry for him in the index on <www.ancestry.com> to the pension index by name (searched December 2006)]