return the South Australian Government presented him with a large grant of land in the district which he had explored. Mr. Stuart now turned his attention to crossing the interior, and, with the assistance of his friends Messrs. Chambers and Finke, he was enabled to make two preparatory expeditions in the vicinity of Lake Torrens--from April 2nd to July 3rd, 1859, and from November 4th, 1859, to January 21st, 1860. The fourth expedition started from Chambers Creek (discovered by Mr. Stuart in 1858, and since treated as his head-quarters for exploring purposes), on March 2nd, 1860, and consisted of Mr. Stuart and two men, with thirteen horses. Proceeding steadily northwards, until the country which his previous explorations had rendered familiar was left far behind, on April 23rd the great explorer calmly records in his Journal the following important announcement: "To-day I find from my observations of the sun that I am now camped in the CENTRE OF AUSTRALIA." One of the greatest problems of Australian discovery was solved! The Centre of the continent was reached, and, instead of being an inhospitable desert or an inland sea, it was a splendid grass country through which ran numerous watercourses. Leaving the Centre, a north-westerly course was followed, but, after various repulses, a north-easterly course eventually carried the party as far as latitude 18 degrees 47 minutes south, longitude 134 degrees, when they were driven back by the hostility of the natives. As has already been stated, Mr. Gregory in 1855, starting from the north-west coast, had penetrated to the south as low as latitude 20 degrees 16 minutes, longitude 127 degrees 35 minutes. Mr. Stuart had now reached a position about half-way between Gregory's lowest southward point and the head of the Gulf of Carpentaria. Without actually reaching the country explored by Gregory, he had overlapped his brother explorer's position by one degree and a half, or more than one hundred miles, and was about two hundred and fifty miles in actual distance from the nearest part of the shores of the Gulf. It is important to remark that the attack of the savages which forced Mr. Stuart to return occurred on June 26th, 1860, so that he had virtually crossed the continent two months before Messrs. Burke and Wills had left Melbourne.* (* They did not leave Cooper Creek until December 14th, rather more than a fortnight before Mr. Stuart started on his fifth expedition.)