He was born in 1820/21 (6 (41 in 1861)). He was born in Ireland (6).
When he enlisted, he was a coachm[aker?] (6).
When he enlisted, he was 5 feet 6-3/4 inches tall, and had a dark complexion, grey eyes, and mixed hair (6).
He was mustered into service on 27 September 1861 (1). He was a private in company I (1, 8).
He fought at the Battle of Gettysburg (7).
On 15 August 1863, he was detailed for duty as a regimental hospital attendant, and ordered to report to Assistant Surgeon William Kier (2, 5 [20 Aug]).
He reenlisted as a veteran volunteer on 26 December 1863 (1, 6). He was enlisted for three years, at Bealton, Virginia, by Lieutenant Swan (6).
On 15 October 1864, Sellers reported that O'Dougherty was a hospital attendant at the division hospital under the authority of surgeon William Kier, but had not been regularly detailed (3).
On 17 November 1864, Sellers included him in a report "[i]n compliance with S.O. 59 dated Hd Qrs 5 Army Corps November 15" 1864" (4).
He mustered out on 10 July 1865 with his company (1, 6). He was a private, in company I (8).
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)
2 special order 55, HQ 91st PA, 15 August 1863
3 letter, Sellers to Tayman, 15 October 1864 (John O Dougherty)
4 letter, Sellers to Bartlett, 17 November 1864
5 [list of detailed men, probably from Sept 1864] (John O Dogherty)
6 company I, descriptive roll, #25 (John O Dougherty]
7 Pennsylvania Memorial, Gettysburg, Pennsylvania (J O'Dougherty)
8 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (John O'Dougherty)