Source: Manitoba HS site for war memorials. See link.
Family Search: When Private Harold Pierson was born on 4 October 1893, in Flintshire, Wales, his father, Frederick Arthur Pierson, was 32 and his mother, Eleanor Catherine Davies, was 28. He immigrated to Canada in 1913 and lived in Cheshire, England, United Kingdom in 1907 and Gesto, Colchester North Township, Essex, Ontario, Canada in 1915. He registered for military service in 1915. In 1915, at the age of 22, his occupation is listed as farming in Gesto, Colchester North Township, Essex, Ontario, Canada. He died on 28 June 1918, in Rouen, Seine-Maritime, Upper Normandy, France, at the age of 24, and was buried in Rouen, Seine-Maritime, Upper Normandy, France.
Lied about his year of birth. Born 1893, not 1896.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 