Source: 18th Battalion Nominal Roll, April 1915.
Family Search: When Oscar John Mitchell was born on 23 March 1893, in London, Ontario, Canada, his father, Angus William Mitchell, was 28 and his mother, Charlotte or Lottie Brown, was 16. He married Blanche Maud Markham on 24 November 1918, in England, United Kingdom. They were the parents of at least 1 daughter. He lived in Middlesex, Ontario, Canada for about 10 years and Sarnia, Kent, Ontario, Canada in 1921. He registered for military service in 1914. In 1914, at the age of 21, his occupation is listed as finisher. He died on 20 March 1959, in London, Ontario, Canada, at the age of 65.
War Diary of the 18th Battalion CEF 