Bates (1) and the register of men transferred (3) have
He was 31 years old when he enlisted (2). He was born in Carlon, Ireland (2). He was a carpenter (2).
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). He was enlisted by Captain Lentz, and mustered into service by Colonel Reiff (2).
He was wounded in action at Chancellorsville, Virginia (2, 5).
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).
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)