He was born in 1816/17 (44 in 1861), 5 (44 in 1861)).
He enlisted and was mustered into service as a private, in company I, at Philadelphia, Pennsylvania, on 27 November 1861 (1 [possibly 26 November]; 4 [27 Nov]; 5 [co.D, 26 Nov], 6).
He was transfered to company D.
He deserted on 2 October 1861 [sic] (1) or 2 November 1862 (4).
He was declared a deserter on 27 February 1863 (2).
He was discharged at Camp Convalescent, on 13 February 1863 (3). He was a private, in company D (6).
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 Ryan)
2 consolidated morning report, 91st PA, 27 February 1863 (Private Ryan)
3 company D, register of men discharged, entry 25 (Thomas Ryan)
4 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 27 July 2004 (Thomas Ryan [co.I])
5 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 27 July 2004 (Thomas Ryan [co.D]; rolls have 'Rayon, Thomas')
6 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (Thomas Ryan)