He was 39 years old when he was enrolled (2).
He was living in Philadelphia, Pennsylvania, when he was enrolled (2).
He was enlisted and mustered into service on 29 October 1861 (1, 2). He was enlisted at Philadelphia, Pennsylvania (2). He was mustered in as a private, at Philadelphia, Pennsylvania (2). He served as a private in company B (1).
He seems to have been dropped as a deserter on 3 July 1864 (3). He was not on the muster-out roll when the regiment mustered out (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) (Samuel Wilson)
2 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 29 June 2004 (Samuel Wilson)
3 consolidated morning report, 91st PA, 3 July 1864 (Private Wilson)