He was 30 years old when he was enrolled (2).
He was a substitute (1, 2). He was enrolled and mustered into service on 29 March 1865 (1, 2). He was mustered in as a private, at West Chester, Pennsylvania (2). He served as a private in company B (1).
He was dropped from the rolls as a deserter, on 1 July 1865 (1, 2, 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) (Michael O'Harra)
2 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 29 June 2004 (Michael O'Harra; rolls have O'Hara)
3 consolidated morning report, 91st Pennsylvania, 4 July 1865 (OHarra)
[I did not find an entry for him in the index on <www.ancestry.com> to the pension index by name (searched March 2007)]