# Gerald Harnett Halligan

> Australian hydrographer and civil engineer (1856–1942)

**Wikidata**: [Q21538327](https://www.wikidata.org/wiki/Q21538327)  
**Source**: https://4ort.xyz/entity/gerald-harnett-halligan


## References

1. Australian Dictionary of Biography
2. Virtual International Authority File
3. [Australian Dictionary of Biography](http://adb.anu.edu.au/biography/halligan-gerald-harnett-6533)
4. Encyclopedia of Australian Science and Innovation
5. Trove