He was 45 years old when he was enrolled (4).
He was enrolled and mustered into service as a private on 16 December 1861, at Philadelphia, Pennsylvania (1, 4). He served as a private in company B (1).
He was discharged on 17 February 1863 on surgeon's certificate of disability (1 [Apr 63], 2, 4 [Apr 63]).
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) (Bently Roberts)
2 consolidated morning report, 91st PA, 11 March 1863 (B J [??] Roberts)
3 company B, descriptive roll, entry 33 (Bently P [?] Roberts) (no information)
4 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 31 May 2004 (Bently Roberts)
[I did not find an entry for him in the Ancestry index to the pension index by name (searched April 2007)]