Source: Per post by Allan Miller at 18th Battalion Facebook Group.
Find-A-Grave: May be buried at Mayhew Cemetery, Kent.
Family Search: Private Harry Quelch was born on 7 April 1899, in Dublin, County Dublin, Ireland as the son of James Quelch. He immigrated to Canada in 1915 and lived in Chatham, Kent, Ontario, Canada in 1917. He registered for military service in 1917. In 1917, at the age of 18, his occupation is listed as labourer in Chatham, Chatham-Kent, Ontario, Canada.
The news clippings below cannot be verified to apply to this man.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 