| Regimental number | 4871 |
| Other Names | Clifford William |
| Religion | Church of England |
| Occupation | Commercial |
| Address | 98 Hammersley Road, Subiaco, Western Australia |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Father, Thomas George Sadlier, 49 East Terrace, Adelaide, South Australia |
| Enlistment date | 31 May 1915 |
| Date of enlistment from Nominal Roll | 26 May 1915 |
| Rank on enlistment | Private |
| Unit name | 1st Australian General Hospital, Special Reinforcements (Hospital and Convalescent Home) |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A62 Wandilla on 25 June 1915 |
| Rank from Nominal Roll | Lieutenant |
| Unit from Nominal Roll | 51st Battalion |
| Fate | Returned to Australia 24 August 1918 |
| Family/military connections | Brother: 4872 Corporal Clarence Andrew James SADLIER, 5th Divisional Ammunition Column, returned to Australia, 25 January 1919. |
| Other details | Also served in World War II: Service No W48375. |