There is no "Soldiers Effects" file and no Irish death cert although the abstract exists. I don´t think he was serving in Ireland when he died. He has CWGC recognition
1895 Sept born Blarney, Cork, Ireland. Parents Mortimer Thomas and Margaret (Sheehan) O’Driscoll
1901 census Monacappa, Blarney, Cork
1911 census at Ardamadane , Blarney
1915 May 20 14th Heavy Battery, Royal Garrison Artillery arrived in France
1915 June 24 Gunner John (Jack) O’Driscoll disembarked in France
1920 Dec 14th Battery, Royal Garrison Artillery (4 Medium Brigade) was at Shoeburyness, southeast Essex, England, at the mouth of the Thames Estuary.
1921 Mar 3. Died at Waterloo Rd, Blarney, Cork of Phthisis and death reported by his brother Mortimer
His brother William was drowned while serving in North Russia
British Soldiers died in Ireland