He was 27 years old when he was enlisted (2).
He was 5 feet 6 inches tall, and had a fair complexion, blue eyes, and black hair (2).
He was enlisted and mustered into service on 21 October 1861 (1, 2). He was enlisted at Philadelphia, Pennsylvania (2). He was mustered in, at Philadelphia, Pennsylvania, as a private in company I (1, 2).
He deserted on 8 June 1862, from Alexandria, Virginia (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) (Fred'k Heilman)
2 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 29 March 2005 (Fred'k Heilman [rolls have 'Frederick'])
[I did not find an entry for him in the index on <www.ancestry.com> to the pension index by name (searched February 2007)]