Source: February 1916 casualty.
Family Search: When Duncan Alexander Colvin was born on 28 August 1886, in Lobo Township, Middlesex, Ontario, Canada, his father, Alexander Colvin, was 35 and his mother, Jessie Fraser, was 30. He registered for military service in 1915. In 1915, at the age of 29, his occupation is listed as farmer in Lobo Township, Middlesex, Ontario, Canada. He died on 24 February 1916, in Wijtschate, West Flanders, Belgium, at the age of 29, and was buried in Ieper, West Flanders, Belgium.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 