| Place of birth | Paddington, Sydney, New South Wales |
| School | Cleveland Street Public School and Blackfriars Training College, New South Wales |
| Other training | Teacher in Public Schools. |
| Religion | Church of England |
| Occupation | Clerk |
| Address | 20 Charles Street, Enmore, Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 28 |
| Height | 6' 0.5" |
| Weight | 210 lbs |
| Next of kin | Father, Frank Edwin Lonsdale, 20 Charles Street, Enmore, Sydney, New South Wales |
| Previous military service | Prior to enlisting held a commission in the Citizen Military Forces as Lieutenant in 31st Infantry. |
| Enlistment date | |
| Rank on enlistment | Captain |
| Unit name | 17th Battalion, D Company |
| AWM Embarkation Roll number | 23/34/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board Transport A32 Themistocles on |
| Rank from Nominal Roll | Captain |
| Unit from Nominal Roll | 17th Battalion |
| Other details from Roll of Honour Circular | He was adjutant at Liverpool Camp, NSW, and adjutant of the 17th Bn prior to embarking. |
| Fate | Died of wounds |
| Place of death or wounding | Gallipoli, Turkey |
| Age at death | 28 |
| Age at death from cemetery records | 28 |
| Place of burial | Pieta Military Cemetery (Plot B, Row XVII, Grave No. C), Malta |
| Panel number, Roll of Honour, Australian War Memorial | 83 |
| Miscellaneous information from cemetery records | Parents: Frank and Fanny LONSDALE, 20 Charles Street, Enmore, New South Wales. Commemorated in Rookwood Necropolis, Sydney, New South Wales. Photo: Peter Dennis |
| Family/military connections | Brother: 758 Pte Lionel Marcellus LONSDALE DCM, 18th Bn, returned to Australia, 18 July 1919. |
| Other details |
War service: Egypt, Gallipoli Medals: 1914-15 Star, British War Medal, Victory Medal |
| Sources | NAA: B2455, LONSDALE Frank Leslie |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
