Source: 18th Battalion Nominal Roll, April 1915.
Family Search: When Private Sidney Oliver Gray was born on 11 May 1896, in Mere, Wiltshire, England, United Kingdom, his father, Charles Alfred Mitchell, was 27 and his mother, Elizabeth Ann Cowley, was 31. He married Violet Kathleen Jay in 1918, in Langport, Somerset, England, United Kingdom. They were the parents of at least 2 sons and 1 daughter. He immigrated to Ontario, Canada in 1913. He registered for military service in 1914. In 1914, at the age of 18, his occupation is listed as farmer. He died on 27 June 1975, in Clevedon, Somerset, England, United Kingdom, at the age of 79
History of the 18th Battalion CEF, "The Fighting Eighteenth" 