Source: 18th Battalion Medal list in booklet.
Find-A-Grave
Family Search: When Private Ernest Fielding Clark was born on 27 September 1897, in Huron, Ontario, Canada, his father, Daniel Frances Clark, was 24 and his mother, Elizabeth Ann McConnell, was 20. He lived in London, Ontario, Canada in 1919 and Stratford, Perth, Ontario, Canada in 1921. He registered for military service in 1915. In 1915, at the age of 18, his occupation is listed as farmer in Lucknow, Bruce, Ontario, Canada.
Military Medal
History of the 18th Battalion CEF, "The Fighting Eighteenth" 