Digitized Service Record: Note his name is listed as Barrie, William at this web site.
Source: SS Caronia Passenger Manifest. 1919.
Find-A-Grave
Family Search: When Corporal William Edward Barry was born on 9 June 1897, in Muskoka, Ontario, Canada, his father, William James Barry, was 21 and his mother, Isabella McDonald, was 27. He lived in Ontario, Canada for about 4 years and Parry Sound, Ontario, Canada for about 12 years. He registered for military service in 1915. In 1915, at the age of 18, his occupation is listed as labourer in Parry Sound, Ontario, Canada
History of the 18th Battalion CEF, "The Fighting Eighteenth" 