Source: Per direct message from Allan Miller and a follow up post at the 161st Huron Battalion CEF Facebook Group.
Family Search: When Private Charles Earl McIntosh was born on 24 August 1889, in Sarnia, Lambton, Ontario, Canada, his father, James Mason McIntosh, was 39 and his mother, Elizabeth Stevenson, was 33. He had at least 2 daughters with Eleanor Sara Fuller. He lived in Lambton, Ontario, Canada for about 10 years. He registered for military service in 1916. In 1916, at the age of 27, his occupation is listed as cook in Sarnia, Lambton, Ontario, Canada. He died on 8 April 1953, in Toronto, Ontario, Canada, at the age of 63, and was buried in York Cemetery, Toronto, Ontario, Canada.
This soldier enlisted with the 149th Battalion on January 26, 1916. He was shipped to England with his battalion and was transferred to the 18th Battalion on March 29, 1918. He arrived in the field on August 8, 1918, and served with the Battalion for the rest of the war, being discharged at London, Ontario on May 24, 1919, when the Battalion was disbanded.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 