On this occasion, Babbage gave more time to discovery than he had done before. He went out beyond the boundaries of his survey, and pushed on to Chambers Creek, so called by Stuart, who discovered it while Babbage was busy at Lake Gairdner. Babbage traced Chambers Creek into Lake Eyre, and was thus the first discoverer of this lake, which he called Lake Gregory. He found a range which he called Hermit Range, but from its crest discerned no sign of Lake Torrens, thus settling a certain limit to its extension to the north. He made further explorations to the west of Lake Gregory, now Lake Eyre, and found some hot springs. Meanwhile, during the time he was making these researches, the Government had, in a very high-handed manner, appointed Warburton to supersede him. Warburton started out to find Babbage, taking Charles Gregory as his second. Failing to find him at the Elizabeth, he followed and overtook him at the newly-discovered Lake Gregory. Warburton made a few discoveries while seeking for Babbage, amongst them the Douglas, a creek which was afterwards of great assistance to Stuart, and the Davenport Range; and he also came upon some fair pastoral country. Babbage's surveys and explorations had done much to clear up the mystery and confusion that had hitherto obscured the geography of the salt lake region. His discovery of Lake Eyre (Gregory) and of the complete isolation of Lake Torrens, reduced the component parts of that huge saline basin to some sort of method and order. In addition to these achievements, Surveyor Parry made some further discoveries both of fresh water and available pastoral country to the eastward of the Lake. B. Herschel Babbage was the eldest son of the well-known inventor of the calculating machine. He had been educated as an engineer, and for a considerable time had followed his profession in Europe. He had been engaged on several main lines in England, and had worked in conjunction with the celebrated Brunel. He had also been commissioned by the Government of Piedmont to report on a line across the Alps by way of Mount Cenis. He had remained in Italy some years until his work was interrupted by the revolution. He had returned to England, and had subsequently come to South Australia in 1851, in the ship Hydaspes. He died at his residence, in 1878, at St. Mary's, South Road, where he had a vineyard. 13.2. JOHN MCDOUALL STUART. [Illustration. John McDouall Stuart.] John McDouall Stuart, the great explorer of the centre of Australia, arrived in South Australia in 1839. His first experience of Australian exploration was sufficiently trying, gained as it was when he was acting as a draughtsman with Captain Sturt on his last arduous expedition. But it had kindled in him a high ardour for discovery, and fostered a stubborn resolution to carry through whatever he undertook.