Bates (1) and the register of men transferred (3) have Whelan, and the descriptive roll (2) has Whalen.
He was born in 1829/30 (2 (31 in 1861)). He was born in Carlon, Ireland (2).
When he enlisted, he was a carpenter (2).
When he enlisted, he was 5 feet 5-1/2 inches tall, had a light complexion, blue eyes, and light hair (2).
He enlisted and was mustered into service in company E for three years on 21 August 1861, at Philadelphia Pennsylvania (1, 2, 9). He was enlisted by Captain Lentz, and mustered into service by Colonel Reiff (2).
He was wounded in action at Chancellorsville, Virginia (2, 5, 7 [wounded in hand], 8 [hand]).
On 8 September 1863, he was a nurse [?] at Haremont Hospital, Washington, DC (4).
He was transferred in October 1863 to the veterans' reserve corps, because he was unfit for field duty (1, 2, 3). When transferred, he was a private, in company E (9).
On 22 April 1874, he applied unsuccessfully for a pension (6).
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)
2 descriptive roll, company E, entry 74 (John Whalen)
3 register of men transferred, company E, entry 8
4 letter, Sinex to Marvin, 8 September 1863
5 'Further from General Hooker's army', Philadelphia Inquirer, 7 May 1863, page 1 (J Whalen)
6 pension index, by regiment, 91st PA Infantry, company E (John Whelan)
7 'The ninety-first Pennsylvania volunteers', Philadelphia Press, Wednesday 13 May 1863, page 2 (John Whalin)
8 'The Ninety-first Pennsylvania at Chancellorville', Philadelphia Inquirer 13 May 1863, page 8 (John [illegible])
9 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (John Whelan)