| Regimental number | 336 |
| Religion | Church of England |
| Occupation | Station hand |
| Marital status | Single |
| Age at embarkation | 24 |
| Next of kin | Father, Frank Poselthwaite, Brenton, Tavistock, Devon, england |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 11th Light Horse Regiment, B Squadron |
| AWM Embarkation Roll number | 10/16/1 |
| Embarkation details | Unit embarked from Brisbane, Queensland, on board HMAT A7 Medic on |
| Embarkation details | Unit embarked from Brisbane, Queensland, on board HMAT A30 Borda on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 5th Light Horse Regiment |
| Fate | Killed in Action |
| Miscellaneous details (Nominal Roll) | *surname two spellings Poselthwaite and Postlethwaite |
| Age at death from cemetery records | 22 |
| Place of burial | Shell Green Cemetery (Plot I, Row D, Grave No. 7), Gallipoli, Turkey |
| Panel number, Roll of Honour, Australian War Memorial | 4 |
| Miscellaneous information from cemetery records | Parents: Frank POSTLETHWAITE (as spelt), M.R.C.S., and Emma POSTELTHWAITE, Brenton, Tavistock, Devon, England |