He seems to have started life as Samuel Priestly Mann, changed to Priestley Don, then Samuel Priestly Donne from 1914 onwards. The spelling of Priestly/Priestley/Priestlay varies
I don't get why he changed his surname to Donne. I wonder if he had a falling out with the family. I have personal letters that were sent my grandfather when he was in the Boer War & in one he mentions Robert Mann is going to get married again. "He seems to be in a great hurry as his first wife can't have been dead long." Letter dated Dec. 19th, 1900. Wonder if he didn't like his new stepmother! I have no idea what he did after 1922 unless I find some descendants
1882 Apr/ 13.Born Leeds, Yorkshire
1891 census at School House, Shadwell, Leeds
1901 census at School House, Main Street, Shadwell
1903 Oct 17. Samuel Priestly Mann married Ethel Day in Leeds
1911 census at 10 Northgate, Bridgwater, Somerset. He is now using "Don" as a surname
1918 Jul 5. MC gazetted. 2nd Lt. Priestly Donne, W. York. R. For conspicuous gallantry and devotion to duty. He led his platoon forward and captured his objective. He then reorganised his men, led them forward, and established a strong point. He put several enemy snipers out of action
1918 Jul 5. Acting Capt P Donne M.C. (temp 2nd Lt West Yorks) relinquishes acting rank of captain on ceasing to be employed by TF
1918 Nov 30 W. York. R. The undermentioned temp. 2nd Lts. to be temp. Lts. : P. Donne, M.C., with precedence next below A. E. Bolls
1918 Jun 20. W. York. R.. Temp. Lt. P. Donne, M.C., retains the actg. rank of Capt. while comdg. a Co., York& Lane. R.
1919 Apr 8. W. York. R. Temp. Lt. P. Donne, M.C., relinquishes the actg. rank of Capt. on ceasing to comd. a Co., 18th Bn., York and Lane. R.
1920 Jan 19. Temp. Lt. (actg. Capt.) P. Donne, M.C., Serv. Bn., W. York. R., from 19th Jan. to 3rd Mar. 1920
1920 Mar 7. Temp. Lt. P. Donne, M.O., relinquishes his commission on completion of service, and is granted the rank of Capt.
1920 Oct 20. Joined ADRIC with service no 787. Posted to L Coy
1920 Dec 20. Promoted Section Leader
1921 Feb 8 Posted to Depot Coy
1921 Mar 7. Posted to J Coy
1921 Mar 19. Posted to P Coy. Reverts to T/Cadet
Fined £2 by Coy Commander
1922 Jan 24. Discharged at demobilisation of ADRIC. Paid £202 severance pay on balance of his contract.
1939 Registry. Living at 152 Cateswell Road , Birmingham. A General Office Manager at Toll Investment. Living with wife Donna
1940 Nov 20. The undermentioned Capts. to be Lts.: — Samuel Priestley DONNE, M.C. (154554).
1941 Jul 3. Regularises his change of name!
1961 Jan 20. Died Devon age 78