Sergeant Pilot Alfred Digby Pelton

Sergeant Pilot (Air Force).

Religion - Episcopalian

Service number at enlistment: 12078

Circumstances of death: Airplane crash.

Apparently the squadron was transferred to American command in February 1918 but Pelton stayed in the French Air Force.

Lafayette Escadrille Memorial

Description:
The memorial to the Lafayette Escadrille and the tombs of many of those pilots.
Address:
D907 (Bd. Raymond Poincare) , Marnes-la-Coquette , 92-Hauts-de-Seine , Ile-de-France , France
On D907 (Bd. Raymond Poincare), between Rue Pasteur and Allee de la Marche. In the park south of D907, west of the pond. Pelton buried under the memorial, inside the crypt. Isolated Burial

What I can say is that this aviator Alfred Pelton was born in Canada in 1886 served in the French army, first as a corporal in the squadron N151 (from 27 September to December 1st, 1917)
He then benefited a leave of three months in winter in Canada. He is back in France on March 5, 1918, with the rank to Sergeant in the squadron N97 until his death May 31, 1918, when he was shot during a fight over the enemy lines near Soissons.
(his name is inscribed on the war memorial in Soissons)
Although not a member of the Lafayette Escadrille 124, he joined the Corps Lafayette of American airmen who fought in the French Air Force, is buried in Marne la Coquette in Lafayette Memorial

Note that his brother George was killed in France while serving in the Canadian Expeditionary Force, wanting to avenge his brother he wanted to enlist in the Royal Flying Corps, but it was rejected because of his age (31?)
Undeterred, he sailed for France via New York (it's probably why it was considered a U.S. citizen) and was accepted to the aeronautical service February 19, 1917.
Then usual route : Avord, Pau and GDE -he received his patent on July 15, 1917 on Caudron plane.

Source: 'The Lafayette Flying Corps' Dennis Gordon