Several stories attributed to aboriginal legends account for the entombment of three sisters in stone. In one story, three daughters of Tyawan, leader of the Katoomba tribe that lived above the escarpment became threatened by the Bunyip monster from the valley below. To save them Tyawan temporarily turned them to stone using a magical bone. Now in danger himself he transformed into a lyre bird, but in making his escape lost the magical bone. Without the bone he was powerless to reverse the spells, and to this day the three sisters watch over the valley where Tyawan the lyre bird calls to them while scratching the earth in a never-ending search.