Source: Veterans of Southwestern Ontario Blog
Two articles have been written in regards to this soldiers service with the 18th Battalion. Friends with Sergeant A.H. Jackson, also of the 18th:
The Bryant/Drouillard Wedding Mystery and The Bryant/Drouillard Wedding Mystery Solved
Joined the Battalion then was married and then deserted the C.E.F.

Photo showing Private Bryant and Miss Elizabeth Drouillard with the Reverend Carlisle presiding. The London Advertiser, November 12, 1914. The witnesses are A.H. Jackson who may be Sergeant Allen Harold Jackson, reg. no. 53349 of Detroit, Michigan and Miss Cora Reed of London, Ontario.

Source: Operation Picture Me via The 18th Battalion Facebook Group. London Free Press Circa 1914.

Private Bryant’s friend, Sergeant Allen Harold Jackson, lived in Detroit, Michigan as this War Service Gratuity record clearly demonstrates.