Here is his service record from the CWGC

Name: TEARLE, Initials: J H
Nationality: United Kingdom Rank: Rifleman
Regiment/Service: Rifle Brigade Unit Text: 12th Bn.
Age: 26 Date of Death: 16/03/1917
Service No: S/21464
Additional information: Son of John and Alice Tearle, of Willesden, London; husband of Dorothy Amelia Tearle, of 123, Malvern Rd., West Kilburn, London.
Casualty Type: Commonwealth War Dead Grave/Memorial Reference: V. A. 2.
Cemetery: SAILLY-SAILLISEL BRITISH CEMETERY
James was born in Paddington, says SDGW. The CWGC adds that he was 26 when he died, hence b1891.

National Roll of the Great War says:

Tearle, J H, Rifleman,

It took me a while to find out the story of this family, but Barbara Tearle of Oxford reminded us that John and Alice are actually Jonathan and Alice nee Kearns, and that Jonathan 1862 of Stanbridge was a son of William 1832 of Stanbridge and Catharine nee Fountain. Here are two brothers, members of my own family, who have gone to Willesden. So I have a common ancestor for them. William’s father and Jonathan’s grandfather is my gg-grandfather, Thomas Tearle 1807 of Stanbridge who married Mary Garner of Toddington.

The army notes (below) that he was killed “In Action”, and that one small gratuity was sent to his parents, and one small gratuity was sent to his wife.

James Harry Tearle UK Army Effects.

Here is Sailly Saillisel British Cemetery in the Somme Valley, Pas-de-Calais, France.

The gate, Sailly-Saillisel British Cemetery.

Massed graves – Sailly-Saillisel British Cemetery.

J H Tearle in the Book of Remebrance, Sailly-Saillisel British Cemetery.

James Harry Tearle headstone. “God’s finger touched him and he slept.”