He is also identified in F Coy Platoon photo and F Coy Football team
1894 Oct 14 Born Nottinghamshire (RIC) . He has changed his name at some point because he was not born "John Christopher Sullivan" in 1894 in Notts. He appears to be born Christopher Sullivan in Mansfield, Notts
1911 census at 8 Downing St Sutton-in-ashfield Notts (in Mansfield district)
1919 Mar 17. Commissioned 2nd Lt in Notts & Derby Regt. Commission on demobilisation as John Christopher Sullivan
1920 Dec 29. Joined ADRIC with service no 1332. Posted to F Coy
1921 Married Frances Alice Crow in Dublin
1922 Jan 17. Still appears to be serving when the ADRIC is demobilised
1939 Register Living with Frances A Sullivan at 29 Vincent Crescent , Chesterfield M.B., Derbyshire. He is Assistant Supert in an Assurance Company
1958 Feb 24. Died Derbyshire aged 64