Source: Per research by 160th Battalion Facebook Group. Confirmed served with 18th Battalion.
Family Search: Private Thomas Farmer was born on 28 September 1892, in Walthamstow, London, England, United Kingdom as the son of Edward Farmer and Augusta White. He married Olive Kelford on 19 January 1922, in Toronto, Ontario, Canada. He immigrated to Canada in 1915 and lived in Southampton, Saugeen Shores, Bruce, Ontario, Canada in 1916 and Toronto, York, Ontario, Canada in 1922. He registered for military service in 1916. In 1916, at the age of 24, his occupation is listed as farm labourer in Southampton, Saugeen Shores, Bruce, Ontario, Canada. He died on 28 June 1976, at the age of 83.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 