| Place of birth | Mercury Bay, New Zealand |
| Religion | Church of England |
| Occupation | Stock buyer |
| Address | 5 Holt Street, Surry Hills, Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 25 |
| Height | 5' 8.5" |
| Weight | 159 lbs |
| Next of kin | Father, E Clay, Empire Road, Epsom, Auckland, New Zealand |
| Previous military service | Served for 5 years in Officer Training Corps, New Zealand; left to go to India, and served for 1.5 years in the Calcutta Light Horse. |
| Enlistment date | |
| Place of enlistment | Liverpool, New South Wales |
| Rank on enlistment | 2nd Lieutenant |
| Unit name | Medium Trench Mortar Battery Reinforcement 2 |
| AWM Embarkation Roll number | 13/129/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A60 Aeneas on |
| Rank from Nominal Roll | Lieutenant |
| Unit from Nominal Roll | 1st Division Artillery |
| Fate | Returned to Australia |
| Miscellaneous details (Nominal Roll) | No details of fate entered on Nominal Roll. |
| Discharge date | |
| Family/military connections | Brother: 10 Lt George CLAY, 9th Bn, returned to Australia, 3 January 1918. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
| Sources | NAA: B2455, CLAY Godfrey Allan |