He was born in 1837/38 (3 (23 in 1861)).
He enlisted and was mustered into service, at Philadelphia, Pennsylvania, on 25 September 1861 (1, 3). He was mustered in as a private, in company D (1, 3, 4-5).
He deserted (2). (The location of his entry in the register of deserters suggests he deserted in 1861.)
He was not accounted for when the regiment mustered out (1, 3). He was a private, in company D (4-5).
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) (Samuel Sheppard, Junior)
2 company D, register of deserters (Samuel Shepherd)
3 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 7 August 2004 (Samuel Sheppard, Jr; rolls have 'Samuel J Shephard')
4 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (Samuel Sheppard Jr.)
5 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (Samuel Shephered)