Numeric Register has him as 2nd Lt, Alphabetic Register has "Sapper", difficult to fathom out what is going on here. My assumption is that he was in the RE as a Sapper throughout WW1, then was demobbed and joined up again part time in RA with a commission in the Territorials
1899 May 16 (or 22 both on RIC) Born Portsea, Hampshire
1901 census at 142, Albert Road, Portsmouth
1911 census at 4 New Buildings Elm Grove Southsea Portsmouth
1920 Aug 14. The undermentioned to be 2nd Lts. : — ROYAL FIELD ARTILLERY. 1st Wessex Brigade. — Harry Melvin Kenyon. 14th Aug. 1920
1921 Mar 5. 4th. (Wessex) Bde.—2nd Lt. H. M. Kenyon is seed under the conditions of para. 112, T.F. Regs.
1921 Feb 16. Joined ADRIC with service no 1704. Posted to M Coy The General RIC Register shows two entries for him enlisting, the first in Nov 1921, which does not track through to the ADRIC, although his name has "Temp Cadet" appended to it. Then the same man with same details in Feb 1921
1921 Apr 8 . Posted to Depot Coy. He has become ill , and is taken off the books of M Coy while in hospital and recovering. He then returns to M Coy
1921 Apr 13 Admitted Stevens Hospital
1921 Apr 18 Discharged Hospital
1921 Apr 18 to 30 May on Medical Leave
1921 May 28 . Posted to M Coy
1921 Jul 13. Admitted to Hospital.
1921 Aug 16. Permitted to resign on completion of service
1921 Nov 7. Rejoined. Posted to N Coy
1922 Jan 14. Discharged on demobilisation of ADRIC
1922 Ma 5r, 2nd Lt, Rested 54th (Wessex) Bde
1922 Sep 22. Pilot Officer on Probaton in RAF
1925 - 1929 On Electoral Roll at 15 Finborough Road, Kensington
1928 Apr/Jun Married in London to Amelia Ellen Raymond
1928 Oct 3. In Reserve of Officers - ROYAL ARMY SERVICE CORPS. Harry Melvin Kenyon to be 2nd Lt.
1930 Apr 17 . King Edward Hospital Ealing Middlesex Administration London 16th June £100. Motorbike accident