The Forrest Survey of the Interior.
Fine map of the West Australian Exploring Expedition's route of 1872-1874, a trying two-year expedition from Geraldton to Adelaide that revealed the up until then unknown interior of the continent.
The route shows the departure from Geraldton up the Greenough River and towards the Murchison River. Mapping the source of the Murchison River was one of the goals of the expedition. The survey reveals mountains, rivers, salt pans, small lakes, and much more. Details are provided throughout. The map shows the route of the expedition up to the point where it meets the Australian Overland Telegraph line, which had been built just prior to this expedition.
Forrest was well received in Adelaide and Perth following this expedition, cementing his legacy as a surveyor. Following his surveying career and fame from expeditions, he entered politics, and would later become premier of Western Australia.