Source: April 1917 casualty
Family Search: When Private Richard Oliver Cowan was born on 11 January 1891, in Trent River, Trent Hills, Northumberland, Ontario, Canada, his father, Joseph Cowan, was 35 and his mother, Victoria Pomeroy, was 33. He lived in Ontario, Canada, in 1892 and in Northumberland, Ontario, Canada, 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 Trent River, Northumberland, Ontario, Canada. He died on 9 April 1917, in Thélus, Pas-de-Calais, France, at the age of 26, and was buried in Thélus, Pas-de-Calais, France.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 