He was born in 1817/18 (3 (43 in 1861)).
He enlisted and was mustered into service on 25 November 1861 (1, 3). He was enlisted for three years, by Captain Sellers, at Philadelphia, Pennsylvania (3). He was a private in company G (1, 4-5).
He deserted on 26 November 1861, at Philadelphia, Pennsylvania (1, 2, 3). The company descriptive book claims: "after getting his clothing, he left, taking all" (3). He was a private, in company G (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) (John O'Brien)
2 company G, register of deserters (John Obrien [sic])
3 company G, descriptive roll, #55 (John Obrien)
4 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (John O'Brien)
5 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (John O'Bryan)