I am currently guessing that this is the same person as Daniel Farvin (G)?
He was 18 years old when he was enlisted (2).
He was a paper folder when he was enlisted (2). He was living in Philadelphia, Pennsylvania (2).
He was 5 feet 4 inches tall, and had a fair complexion, blue eyes, and brown hair (2).
He was enlisted and mustered into service on 1 March 1864 (1, 2). He was enlisted at Frankford, Pennsylvania (2). He was mustered in as a private, at Frankford, Pennsylvania (2). He served as a private in company G (1).
He was not accounted for when the regiment mustered out (1, 2).
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) (Daniel Farren)
2 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 10 February 2005\ (Daniel Farren [roll has David])