Source: Per news clipping post by David Archer at 18th Battalion Facebook Page (not group).
Note that this officer joined the 18th Battalion as a supernumerary and served between November 1914 to February 1915, when he was discharged from the service. He re-enlisted and served with the 26th Battalion and earned the Military Cross.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 