He was born in 1827/28, in Ireland. [sources: date: 3 (33 in 1861), 9 (72 in 1900), 11 (70 in 1900). place: 11]
He enlisted and was mustered into service, at Philadelphia, Pennsylvania, on 23 September 1861. He was mustered in as a private, in company D. [sources: 1, 3, 5 (24 Sep?), 6, 7, 9]
He was wounded on 13 December 1862 at Fredericksburg, Virginia. [sources: 1, 3]
He was discharged on 23 or 28 April 1863 at Washington DC, on surgeon's certificate of disability. He was a private, in company D. [sources: 1 (23 Apr), 2 (28 Apr), 3 (28 Apr, medical board), 4 (23 Apr), 5 (23), 6 (23 Apr), 7]
On 8 July 1863, he successfully applied for a pension. [sources: 6, 8]
In 1890, he was living in the fourth ward of Philadelphia, Pennsylvania. He was living at 425 [illegible, perhaps 'Monroe'] Street. He had been wounded in his hand. [source: 5]
On 11 October 1900, he died, at Philadelphia Hospital, Philadelphia, Pennsylvania. He died of senile gangrene. He was married. He was buried in National Cemetery, Philadelphia, Pennsylvania. [sources: 9 (8 Oct 1900), 10, 11]
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 Davis)
2 consolidated morning report, 91st PA, 14 May 1863 (Wm Davis)
3 company D, register of men discharged, entry 20 (William Davis)
4 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 8 August 2004 (William Davis)
5 1890 US census, veterans schedule, Pennsylvania, Philadelphia, Philadelphia, supervisor's district 1, enumeration district 87 (7th division, 4th ward), page [blank] (image 365 on Ancestry), line 8 (William Davis)
6 pension index, by regiment, 91st PA Infantry, company D (William Davis)
7 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (William Davis)
8 pension index, by name (William Davis)
9 Pennsylvania, veterans burial cards, 1777-1999 (William Davis)
10 Find a grave, memorial 2540572, imported from US Veteran's Affairs, 3 March 2000, accessed 23 January 2015 (Wm Davis)
11 death certificate, Philadelphia, Pennsylvania, 11 October 1900 (William Davis)