Source: 153rd Wellington web site.
Family Search: When Frederick Clayton McLean was born on 9 October 1896, in Erin, Wellington, Ontario, Canada, his father, William F. McLean, was 32 and his mother, Margaret Elizabeth Bryce, was 21. He married Esther Margaret Stade on 25 May 1920, in Harriston, Minto, Wellington, Ontario, Canada. He registered for military service in 1916. In 1916, at the age of 20, his occupation is listed as commercial traveller in Erin, Wellington, Ontario, Canada. He died in 1983, at the age of 87, and was buried in Erin Cemetery, Erin, Wellington, Ontario, Canada.
“Trade listed as Commercial Traveller. DOB 9-10-91 (24 years 6 months) born Erin Township. Hazel eyes, brown hair. Presbyterian. Archibald Mclean, father. NOK Margaret Near, mother. Enlisted Guelph 25-4-16, lists 2 years service in 30th Wellington Regiment. On 153rd Battalion Nominal Roll 6-5-16, no transfers noted. On 153rd Nominal Rolls as published Guelph Mercury 10-6-16 and 1-12-16. Embarked with 153rd Halifax N.S. SS Olympic 29-4-17. Taken on Strength 18th Battalion, 10-5-18. Returned to Canada aboard SS Caronia,13-5-19. Demobilized London, 31-5-19.Ontario Marriage Registry (627127) married 26-9-19 to Margaret Ellen Bush at Erin. Died 1983, buried Erin Union Cemetery, Erin, headstone photo courtesy Erin Legion, Doug Kirkwood.
File: RG 150, Accession 1992-93/166, Box 7039 – 10, courtesy Library & Archives Canada.”
History of the 18th Battalion CEF, "The Fighting Eighteenth" 