| Regimental number | 275 |
| Place of birth | Petersburg (now Peterborough), South Australia |
| School | School of Mines, Adelaide, South Australia |
| Other training | State School, at which he won a four year scholarship. |
| Religion | Church of England |
| Occupation | Metallurgist |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, John Heithersay, 90 George Street, Norwood, South Australia |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 9th Light Horse Regiment, B Squadron |
| AWM Embarkation Roll number | 10/14/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board Transport A10 Karroo on |
| Rank from Nominal Roll | 2nd Lieutenant |
| Unit from Nominal Roll | Australian Mounted Division |
| Recommendations (Medals and Awards) |
Mention in Despatches Awarded, and promulgated, 'London Gazette', Supplement No. 30169 (6 July 1917); 'Commonwealth Gazette No. 174 (11 October 1917). |
| Fate | Died of wounds |
| Place of death or wounding | Rafa |
| Age at death | 23.8 |
| Place of burial | Kantara War Memorial Cemetery (Rpw F. Grave No. 378), Egypt |
| Panel number, Roll of Honour, Australian War Memorial | 25 |
| Miscellaneous information from cemetery records | Parents: John and Selina HEITHERSAY. Native of South Australia |
| Family/military connections | Brother: 15934 Sapper William Stocks Heithersay, 2nd Divisional Signal Company, died of wounds, 1 September 1918. |
| Other details |
Medals: 1914-15 Star, British War Medal, Victory Medal |