I found it impossible to nail him down. No Irish birth, no Scottish marriage. Not in 1901 census of Ireland
He certainly served as Richard William Sargent. Army have DOB of 1872, the RIC had 1880
He probably served under an alias, but I canot crack his real name
1880 Jan 18 Born Waterford
1914 Oct 30 Enlisted
RE#6942 transfers to RASC
1919 Feb 3 Discharged from RASC #M/08801
1919 Aug 2 married Dumbarton. I cannot get this marriage
1920 Dec 22 enlisted with RIC no 77006 Mechanic & ex-Soldier
1922 Feb 27 Disbanded