Source: 18th Battalion Association Memorial Booklet and Awards.
Family Search: Private Harry Sullivan was born on 24 May 1890, in Chatham, Kent, England, United Kingdom as the son of Sullivan and Nellie. He immigrated to Canada in 1913. He registered for military service in 1915. In 1915, at the age of 25, his occupation is listed as lumberman. He died on 29 January 1946, at the age of 55.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 