To the Nyungar people the taller mountain was called Walwalling (place of weeping) and the lower hill was called Wongborel (sleeping woman).
Koorain Kwotjut in the Dreamtime, the hills Nyungars used to meet the plains and valley people on the flat area at the tjenna of Walwalling for games and sport. Wundig was a Mooditj young man of the hills people who was Kwobinyarn in the skills of Gitjul, Kylie, and Tjenna races. A lot of young yorgas had their Meowls on him. However, Wilura a Mooditj young yorga of the valley people was Tjeruping for him. They were not betrothed because within their tribal groupings it would have been a Warrah relationship. The two decided to ignore the taboo and they woort kooliny together. When it was discovered, the valley Nyungars demanded the return of the young yorga.
The hills Nyungars said they didn’t know where the young couple were. The valley Nyungars did not believe them and declared war.
The hills Nyungars came down over the slopes outnumbering the challengers and a bloodthirsty battle ensued with the valley Nyungars coming off badly. They called in their Mubarm man and asked him to use his Mubarm powers. He was able to change all the hills fighting men into blackboy bushes and to this day you can see the wide band of grass trees where in the Dreamtime the warriors from the hills were coming over the top of Walwalling and down the eastern slope and they stand there still.
The Mubarm man then turned his Mubarm on the young people who caused such bloodshed and put a curse on them. Their Nortch bodies were found later and his curse was that the man’s Kunya would stay on Walwalling and the Yorga’s Kunya was sent to Wongborel and that they would never meet again until the mountains came together.