On March 6, 1918 Second Lieutenant Donovan Sisley and Lt. Arthur Clair Gilmore, a native of St. John, New Brunswick on appointment to the RFC from the 11th Battalion, Canadian Railway Troops, were on a mission southwest of Itancourt, near Séry-lès-Mézières, in FK8 B5838 when they were attacked by a patrol of five Fokkers from Jasta 48. Their aircraft was hit and burst into flames sending both men to their deaths and never to be found. The victory was claimed by the Jasta leader, Ltn. Kurt Küppers. Don was still only 19 when he was killed and confirmation of his death from the RFC came on May 16, just two weeks after what would have been his 20th birthday. Both he and Gilmour are remembered on the Arras Memorial
source: David Fuller