He was 40 years old when he was enlisted (3).
He was enrolled and mustered into service on 27 December 1861 (1, 3). He was enrolled at Philadelphia, Pennsylvania (3). He was mustered in as a private, at Philadelphia, Pennsylvania (3). He served as a private in company D (1).
He deserted in the field, in Virginia, on 1 July 1863 (1, 3).
On 28 July 1863, he was reported as having been dropped because he was missing in the campaign (probably after 11 June 1863) (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) (John Casey)
2 consolidated morning report, 91st PA, 28 July 1863 (Private Casey)
3 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 15 July 2004 (John Casey)