I cannot follow him. I am not convinced that this is all correct. The MIC and service details would seem to be wrong, as ADRIC man was only 2nd Lt according to ADRIC roll, but RIC roll implies birth date and place. is correct
1883 Oct/Dec Born Magherafelt, Londonderry (RIC entry)
1901 May. A William G Graham of the right age left Londonderry for USA He was a General Labourer. The MIC address is in USA
1917 Jun 27. Temp. 2nd Lt. W. G. Graham, from a Serv. Bn., R. Ir. Fus., cadet to be temp. 2nd Lt.
1918 Oct 17. R. Ir. Fus. Temp. 2nd Lt. W. G. Graham to be actg. Capt. while comdg. a Co.
1919 Mar 23. Temp. Lt. W. Graham relinquishes the actg. rank of Capt. on ceasing to comd. a Co.
1919 Sep 2 . Belgian Croix de Guerre. Temporary Lieutenant William George Graham, 9th Battalion, Royal Irish. Fusiliers.
1920 Sep 17. Joined ADRIC with service number 590. Section Leader F Coy
1921 Feb 11. Posted to M Coy. Promoted Platoon Commander.
1921 Jul 9 Posted to F Coy. Reverts to T/Cadet at own request.
1921 Nov 11. Permitted to resign on compassionate grounds.
1921 Nov 15 Relinquishes his commission R. Ir. Fus. Temp. Lt. W. G. Graham, and retains the rank of Lt.