(Sir Tannatt William Edgeworth), 1858–1935, Australian geologist and explorer, b. near Cardiff, Wales. David came to Australia in 1882 as an assistant geological surveyor. In 1891 he was appointed professor of geology and physical geography at the Univ. of Sydney. He was part of the Shackleton expedition to Antarctica (1907–9), in the course of which Mt. Erebus was ascended, the south magnetic pole was located, and the polar plateau was crossed to a point less than 100 mi (160 km) from the South Pole. He was knighted in 1920. His works include Geographical Notes of the British Antarctic Expedition (1909) and The Geology of Australia (1932).