The Sands of Yellow Rock A Kingcroft Production Filmed in the Wollombi Brook Catchment of the Hunter Valley of N.S.W., Australia. Featuring the work of the HUNTER VALLEY RESEARCH FOUNDATION This film is inscribed to the memory of the Pioneers of the Wollombi Their Faith, Courage and Tenacity still live in the spirit of research. … More The Sands of Yellow Rock (1959)