Joseph Milligan sent specimens of a manganese mineral from [[Frenchman's Cap]] and [[Galena]] to the 1851 [[Great Exhibition]] in London. Small amounts of gold were discovered at [[Fingal, Tasmania|Fingal]] and Lefroy in 1851. [[William B. Clarke]], a geologist and Anglican parson, predicted that gold would be found in Tasmania at 146 degrees east longitude line. On 17 July 1859 [[Charles Gould (geologist)|Charles Gould]], a geologist recruited from England, was appointed as the Geological Surveyor of Tasmania by the Tasmanian governor. He began the search for worthwhile minerals in the west, gave up and studied the geology of the eastern half of the state instead. He was commissioned by the [[Tasmanian Government]] in 1862 to return to the [[West Coast, Tasmania|west coast]], he named mountains in the [[West Coast Range]]: [[Mount Lyell (Tasmania)|Mount Lyell]] after [[Charles Lyell]], [[Mount Darwin, Tasmania|Mount Darwin]], [[Mount Huxley, Tasmania|Mount Huxley]] and opponents of Charles Darwin were commemorated with [[Mount Owen, Tasmania|Mount Owen]], [[Mount Sedgwick, Tasmania|Mount Sedgwick]], and [[Mount Jukes, Tasmania|Mount Jukes]]. Gould returned several times but did not find worthwhile mineral deposits. [[James Smith (miner)|James Philosopher Smith]] discovered the [[Mount Bischoff]] tin deposit, for many years the world's richest and largest, on 4 December 1871. This discovery inspired George Renison Bell to find more tin and other minerals in western Tasmania. Dally shortly thereafter found important gold reefs at Beaconsfield and at Lefroy in the northeast.