He was born in 1842/43 (2 (18 in 1861), 3 (18 in 1861)). He was born in Philadelphia, Pennsylvania (3).
When he enlisted, he was a baker (3).
When he enlisted, he was 5 feet 4 inches tall, and had a fair complexion, dark eyes, and dark hair (3).
He enlisted and was mustered into service, at Philadelphia, Pennsylvania, on 23 or 24 September 1861 (1, 2, 3 [24 Sep]). He was enlisted for three years, by Captain Dye (2, 3). He was mustered in as a private in company F (1 (co.D), 2, 3, 4 (co.D)).
He was transferred to company D when the two regiments were consolidated (3).
He was not on the muster-out roll when the regiment mustered out (1). He was a private, in company D (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) (William Weaver)
2 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 10 August 2004 (William Weaver)
3 company F, descriptive roll, #15 (William Weaver) [NB: Bates and the PA Archives cards don't have a William Weaver in co.F. This identification is my best guess!]
4 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (William Weaver)