He was 35 years old when he was enrolled (4).
He was living in Philadelphia, Pennsylvania, when he was enrolled (4).
He was enrolled and mustered into service as a private on 28 October 1861, at Philadelphia, Pennsylvania (1, 4 [14 Feb 62!]). He served as a private in company B (1).
He was discharged on 10 January 1863 on surgeon's certificate of disability (1 [has Dec 62], 2, 4 [Dec 62]).
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) (Daniel Bolen)
2 consolidated morning report, 91st PA, 8 February 1863 (Daniel Bolen)
3 company B [first] descriptive roll, entry 14 (Daniel Bolin) [no information]
4 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 30 May 2004 (Daniel Bolen; rolls have 'Bolin')
[I did not find an entry for him in the index on <www.ancestry.com> to the pension index by name (searched March 2007)]
[I did not find an entry for him in the index on <www.ancestry.com> to the 1890 veteran's census (searched June 2007)]