What is the name of this region of New South Wales, Austrialia, whose coalfield was discovered by Edgeworth David?
Edgeworth David: Sir Tannatt William Edgeworth David (28 January 1858 – 28 August 1934), professionally known as Edgeworth David, was a Welsh Australian geologist and Antarctic explorer. Edgeworth David:  A household name in his lifetime, David's most significant achievements were discovering the major Hunter Valley coalfield in New South Wales and leading the first expedition to reach the South Magnetic Pole.
i don't know