Henry W. Larkham was a resident of Mansfield on August 7, 1862 when he enlisted as a Private in Co. D of the 21st Regiment Connecticut Volunteer Infantry. He was promoted to Corporal on March 7, 1863, to Sergeant on December 12, 1864 and he was mustered out June 16, 1865.

The descriptive muster roll of the 21st Regiment Connecticut Volunteer Infantry lists his age as 18 and his occupation as operative.  He is described as 5’ 8” tall with a fair complexion and brown eyes and black hair.  His marital status is single.

He was born about 1845 in Windham, Connecticut to Alfred and Julia (Reed) Larkham. In the 1860 U.S. census in Mansfield, he is a 15 year old operative in the household of Julia Larkham. Henry Larkham married Emily J. Johnson on February 25, 1867 in Mansfield. After the Civil War, he returned to Mansfield where he worked as a silk dyer in a silk mill. 

On July 23, 1891, he applied for an invalid pension, No. 887,910 that was granted under certificate No. 643,366. His widow applied for a pension on February 15, 1900.

Henry W. Larkham died on January 23, 1900 in Mansfield and is buried in the Atwoodville Cemetery in Mansfield.