He was 18 years old when he was enrolled (3).
He was a substitute (1, 3). He was enrolled and mustered into service on 23 March 1865 (1, 3). He was mustered in as a private, at Reading, Pennsylvania (3). He served as a private in company B (1).
He may have been charged for lost equipments, perhaps when the regiment mustered out (2).
He mustered out with his company on 10 July 1865 (1, 3).
He died on 1 October 1889 (4).
On 7 June 1890, his widow successfully applied for a pension (4).
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 M Boyer)
2 list of men who owed money [?] (J Boyer or JM Boyer [uncertain which is this person])
3 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 23 June 2004 (John M Boyer)
4 pension index, by regiment (John M Boyer)
[I did not find an entry for him in the pension index by name (searched index on <www.ancestry.com>, January 2006)