Source: Per research by 160th Battalion Facebook Group. Confirmed served with 18th Battalion.
Family Search: When Isaac Garrett Norris was born on 24 February 1880, in South Sherbrooke Township, Lanark, Ontario, Canada, his father, James Wellington Norris, was 36 and his mother, Jane Korry, was 32. He had at least 1 son and 1 daughter with Bertha May Baux. He lived in Ontario, Canada in 1880. He died on 27 April 1948, at the age of 68.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 