Source: April 1917 casualty.
Family Search: When Private George Herbert Selkirk was born on 21 January 1891, in Driffield, Yorkshire, England, United Kingdom, his father, Henry T. Selkirk, was 37 and his mother, Elizabeth, was 35. He immigrated to Halifax, Nova Scotia, Canada in 1909 and lived in Lund, Yorkshire East Riding, England, United Kingdom for about 10 years. He registered for military service in 1916. In 1916, at the age of 25, his occupation is listed as farmer in Midland, Simcoe, Ontario, Canada. He died on 9 April 1917, in Thélus, Pas-de-Calais, France, at the age of 26, and was buried in Vimy, Pas-de-Calais, France.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 