He was 19 years old when he enlisted in 1864 (2). He was born in Philadelphia, Pennsylvania (2).
He was a lead pounder (2).
He was 5 feet 5-1/2 inches tall, and had a fair complexion, blue eyes, and brown hair (2).
He enlisted and was mustered into service on 12 January 1864 (1, 2). He was enlisted for three years, at Philadelphia, Pennsylvania, by Captain Stretch (2). He served as a private in company A (1).
He was killed on 18 June 1864 at Petersburg, Virginia (1, 2, 3).
On 7 November 1864, his mother, Winifred McDermott, applied successfully for a pension (4, 5).
On 4 May 1876, his brother (or a minor dependent), Henry Foster, also applied successfully for a pension (4, 5).
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) (Thomas McDermot)
2 company A descriptive roll, entry 113 (Thomas McDermot)
3 consolidated morning report, 91st Pennsylvania, 29 June 1864 (Private McDermott)
4 pension index, by regiment (Thomas McDermott)
5 pension index, by name (Thomas McDermott)
[I did not find him in the index on <www.ancestry.com> to the 1890 veterans census (searched October 2005)]