Source: Per the record of promotion for Wilfrid Edward Kilbourne, reg. no. 400866.
Family Search: Company Quartermaster Sergeant William Bruce Robertson was born on 22 November 1888, in Stirling, Aberdeenshire, Scotland as the son of Robertson and Agnes B. Robertson. He had at least 1 daughter with Anne Robertson. He immigrated to Halifax, Nova Scotia, Canada in 1919 and lived in London, Ontario, Canada in 1931 and Calgary, Alberta, Canada in 1965. He registered for military service in 1915. In 1915, at the age of 27, his occupation is listed as stove fitter in Toronto, York, Ontario, Canada. He died on 4 May 1969, at the age of 80, and was buried in Burnsland Cemetery, Calgary, Alberta, Canada.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 