Source: Witness to the will of Corporal Thomas Wilson Ross, reg. no. 164177.
Find-A-Grave
Appears to have deserted and stayed in the United Kingdom after the war.
“Born in swindon on 08 May 1895 to Fredrick Thomas Fairthorne and Amelia Hatto. Frederick Thomas fairthorne had 4 children. He passed away on 24 Jun 1969 in High Wycombe, Buckinghamshire, England.”
Service Record Fairthorne transfers to RFC and then deserts.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 