"Ngilgi Cave, previously known as Yallingup Cave, is a Karst cave to the northeast of Yallingup, in the southwest of Western Australia. It was discovered by Edward Dawson in 1899 when searching for stray horses. He acted as a guide to the cave from December 1900 to November 1937.
In many sections of the cave a red layer of soil can be seen, this is called Paleosol. […]
It was originally named for the nearby town of Yallingup but later renamed to acknowledge the cave's part in Australian Aboriginal mythology. Ngilgi (pronounced Neelgee) was a good spirit who triumphed in battle against an evil spirit Wolgine." In: Wikipedia