Source: SS Caronia Passenger Manifest. 1919.
Family Search: When Private Clarence Duggan was born on 20 May 1896, in Windsor, Sandwich, Essex, Ontario, Canada, his father, Wilphord David Duggan, was 34 and his mother, Boadecia Pulford, was 29. He married Catherine Belle Waddington on 16 January 1926, in Windsor, Essex, Ontario, Canada. He lived in Essex, Ontario, Canada in 1901. He registered for military service in 1918. In 1918, at the age of 22, his occupation is listed as auto-driver in Windsor, Sandwich, Essex, Ontario, Canada. He died on 3 September 1973, in London, Ontario, Canada, at the age of 77, and was buried in Victoria Memorial Gardens, Oldcastle, Essex, Ontario, Canada.
Sat, Jul 20, 1918 ·Page 7. The article states incorrectly he is in the 15th Battalion.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 