Rank: First Lieutenant
Unit: 2d Cavalry
Enlisted: November 22, 1858 at New York, New York. He enlisted to serve five years in E Co, 1st US Cavalry.
Commissioned: Discharged as a 1st Sergeant on August 20, 1863 and promoted to Second Lieutenant.
Date of birth: 1837
Hometown: Belfast, Ireland
Occupation prior to enlistment: Farmer
Campaign: Civil War
Died: 25 October 1864
Age at death: 26 or 27
Cause of death: Died of wounds received in action
Location of fatality: Front Royal, Virginia
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Place of internment: Body lost or destroyed.
Assigned as the Acting Adjutant in November 1863. He participated in battle of Todd’s Tavern, Yellow Tavern, Hawes’ Sho, Cold harbor, Trevillian Station and Deep Bottom; and actions in Smithfield, Berryville and Winchester. He was wounded near Front Royal on September 23, 1864; died of wounds at Winchester, Virginia. (US Army Register of Enlistments, From Everglade to Canon: History of 2nd Dragoons]
Note: Private Semline’s death is cited in the book:
Also killed at in the same battle was Privates Sibline, Haynes, Tryon and Uber.