Source: Per post by Allan Miller at 18th Battalion Facebook Group.
Family Search: When Duncan Clyde Mellick was born on 5 September 1898, in Plympton, Lambton, Ontario, Canada, his father, George Ross Mellick, was 29 and his mother, Anne Core, was 19. He lived in Lambton, Ontario, Canada for about 10 years and Blackfalds, Lacombe County, Alberta, Canada in 1921. He registered for military service in 1916. In 1916, at the age of 18, his occupation is listed as famer. He died on 22 March 1961, in Lacombe, Lacombe County, Alberta, Canada, at the age of 62, and was buried in Tees Cemetery, Tees, Lacombe County, Alberta, Canad
History of the 18th Battalion CEF, "The Fighting Eighteenth" 