Source: SS Caronia Passenger Manifest. 1919.
Find-A-Grave
Family Search: When Private John Halbert was born on 2 September 1889, in Mossley, Middlesex, Ontario, Canada, his father, John Nelson Halbert, was 33 and his mother, Mary Ann Smith, was 30. He lived in Yarmouth, Elgin, Canada West, British North America in 1891 and St. Thomas, Elgin, Ontario, Canada in 1918. He registered for military service in 1918. In 1918, at the age of 29, his occupation is listed as railway section work in Saint Thomas, Ontario, Canada.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 