An item reported that the Tasmanian whaler Offley, fitted out by Dr. Crowther in July 1858 for sea elephant hunting of Herds Island had a catch pf 52 tons sea elephant oil and 43 tons sperm oil, value 5.000 pound sterling.
Source
Hugh Munro Hull. The experience of forty years in Tasmania. London, 1859.
Source
Hugh Munro Hull. The experience of forty years in Tasmania. London, 1859.