He was 27 years old when he was enrolled (2).
He was enrolled and mustered into service on 29 November 1861 (1, 2). He was enrolled 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 was discharged in May 1862 on surgeon's certificate of disability (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) (William Jacobs)
2 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 28 June 2004 (William Jacobs)