| Regimental number | 1557 |
| Other Names | Isabel Williamsen |
| Religion | Presbyterian |
| Occupation | Baker |
| Address | Merino, Victoria |
| Marital status | Married |
| Age at embarkation | 28 |
| Next of kin | Wife, Mrs Agnes Jane McAlpine, Merino, Victoria |
| Enlistment date | 23 April 1915 |
| Date of enlistment from Nominal Roll | 1 June 1917 |
| Rank on enlistment | Private |
| Unit name | 21st Battalion, 1st Reinforcement |
| AWM Embarkation Roll number | 23/38/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A35 Berrima on 28 June 1915 |
| Rank from Nominal Roll | Staff Nurse |
| Unit from Nominal Roll | Australian Army Nursing Service |
| Fate | Returned to Australia 23 June 1919 |