Long Mack, or Yinpirra, was from Roebourne, and he was a revered Yindjibarndi Rainmaker, who carried the knowledge of water for his people. He lived for many years at Cooya Pooya Station, and had been initiated there according to Burndud Law. His country, Tunkawaana country, was from the Harding Dam back up into the tablelands. He and other local Aboriginal Elders fought a three-year campaign against the construction of the dam, to save significant sites along the Ngurin at Yawajunha. Despite these attempts, the custodians and their country lost their sites to the Harding Dam, which opened in 1985. Unfortunately, Long Mack died, towards the end of 1984. The Yindjibarndi people had no doubt that he died because he had not been able to protect his Land.
He shared his knowledge and stories with children from primary school to include a form of traditional education with their European education.