Source: Per news clipping post by David Archer on the 18th Battalion Facebook Page (not group).
Family Search: When Private Garnet Reginald Johnson was born on 7 January 1897, in Toronto, York, Ontario, Canada, his father, Thomas Johnson, was 34 and his mother, Alice Roberts, was 36. He registered for military service in 1915. In 1915, at the age of 18, his occupation is listed as plumber in Toronto, York, Ontario, Canada. He died on 22 July 1957, in Toronto, Ontario, Canada, at the age of 60, and was buried in Prospect Cemetery, Toronto, Ontario, Canada.
Mon, Jul 22, 1957 ·Page 27.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 