He enlisted and was mustered into service on 22 November 1861 (1, 3). He was enlisted for three years, at Philadelphia, Pennsylvania, by Lieutenant Hamburg [?] (3). He initially served in company G (1).
He was transferred to company A (1).
On 8 January 1862, he was discharged on writ of habeas corpus (issued by the Honorable Jos Allison), because he was a minor (1, 2).
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) (Benjamin Andrews)
2 Register of men discharged, co.A (Benjamin Andrew)
3 descriptive roll, company A, unnumbered entry (Benjamin Andrew)
[I did not find an entry for him in the index on <www.ancestry.com> to the pension index by name (searched October 2006)]
[I did not find an entry for him in the index on <www.ancestry.com> to the 1890 veterans' census]
[I did not find a plausible Benjamin Andrews in the 1860 census--the only remotely possible person was only 8 years old in 1860, which seems too young]