He was 21 years old when he enlisted in 1861 (3).
He enlisted and was mustered into service on 20 August 1861 (1, 3). He was enlisted for three years, at Philadelphia, Pennsylvania, by Captain Starr (3). He served as a private, initially in company A (1).
He was transferred on 4 December 1861 (1) or 8 October 1861 (2).to company I, and promoted to 2nd sergeant (1, 2, 3).
He deserted on 8 December 1862 (1). He was then a sergeant (1).
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) (Walter S Stark)
2 register of transfers, company A (Walter S Stark)
3 company A descriptive roll, entry 52 (Walter S Stark)
[I did not find an entry for him in the index on <www.ancestry.com> to the 1890 veterans' census (searched November 2005)