Source: Gathering Our Heroes
Family Search: When Private Arnold Alexander Irwin was born on 12 June 1897, in Arkona, Lambton, Ontario, Canada, his father, Robert Fulton Irwin, was 27 and his mother, Sarah Elizabeth Todd, was 30. He married Irene Shader Hartell on 3 August 1920, in London, Ontario, Canada. They were the parents of at least 1 son and 1 daughter. He immigrated to Detroit, Wayne, Michigan, United States in 1922 and lived in Toledo, Lucas, Ohio, United States in 1930 and Detroit Ward 21, Detroit, Wayne, Michigan, United States in 1940. He registered for military service in 1915. In 1915, at the age of 18, his occupation is listed as bank clerk in Wheatley, Kent, Ontario, Canada. He died on 14 September 1979, in Santa Clara, California, United States, at the age of 82, and was buried in Colma, San Mateo, California, United States.
Source: Gathering Our Heroes
History of the 18th Battalion CEF, "The Fighting Eighteenth" 