He is a difficult man to track. I am not sure if his name was Arthur Young. His marrige inf that he gave on re-enlistment in 1922 is untraceable, as is the date he gave the RIC. The army record has

and indeed his 1939 register has him with a wife Isabella
There is a marriage in that quarter in Dover of Arthur S Young to Ethel Susan Herbert. This is probably correct for Arthur Young and he probably left her, and later had a permanent relationship with Isabella
1892 Sep 12 Born in St Lawrence, Ramsgate, Kent. There is a birth registration for him in Thanet (Ramsgate)
1901 Census at Ramsgate

1907 circa Enlisted in Buffs. Served in The Buffs as 6278196 for 12 years from 1922 enlistment form. He seems to have enlisted as 9295 and was changed to 9259


1915 Jan 17 Landed in France
1916 Feb 1 Entered hospital with diarrhoea
1915 Feb 7 discharged from 4th Stationary Hospital
1916 Mar 5. Married Isabel Foster on his 1922 army record, but an un-named lady in RIC Register on 1920 Oct 13.
1919 Feb 2 Discharged to B Reserve
1921 Jan 18 Joined RIC with RIC no 78012 & ADRIC no 200 (807) . Hammerman & ex-soldier
1921 Jun 21. Posted 4 Gds
1921 Sep 15 to 29 Sep on Leave
1922 Apr 8 Re-enlists with R West Surrey Regt
1926 Apr 17 Discharged at end of engagement
1939 Register He is a Storeman at RAOC Depot in Dover with wife Isabella
1977 Died Canterbury