| Regimental number | 12201 |
| Place of birth | Maitland South Australia |
| Religion | Church of England |
| Occupation | Fisherman |
| Address | Robert Street, Moonta, South Australia |
| Marital status | Single |
| Age at embarkation | 26 |
| Next of kin | Father, W H Lathlean, Robert Street, Moonta, South Australia |
| Enlistment date | 27 August 1915 |
| Rank on enlistment | Gunner |
| Unit name | Field Artillery Brigade 6, Reinforcement 3 |
| AWM Embarkation Roll number | 13/34/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A32 Themistocles on 28 January 1916 |
| Rank from Nominal Roll | Gunner |
| Unit from Nominal Roll | 6th Field Artillery Brigade |
| Fate | Returned to Australia 9 December 1918 |
| Miscellaneous details (Nominal Roll) | *Spelt William Clymo Lathlean on NR |