He was here kindly treated by Sultan Mahaya, with whom an Arab merchant, named Mansur, was residing, who gave him much valuable information. Taking a walk of three miles along the shores of the lake, accompanied by Mansur and a native, the greatest traveller of the place, he ascended a hill whence he could obtain a good view across the expanse of water spread out before him. Several islands were seen, but some so far-off as scarcely to be distinguishable. Facing to the west-north-west was an unbroken sea horizon, and he calculated that the breadth of the lake was over a hundred miles. The native, when asked the length of the lake, faced to the north, and, nodding his head, indicated by signs that it was something immeasurable, adding that he thought it probably extended to the end of the world. Poor Mansur had been robbed of his merchandise, by a sultan whose territory was on the shore of the lake, and he had very little chance of obtaining redress. Sultan Mahaya was considered the best and most just ruler in those quarters; and when Speke proposed crossing the lake to the island of the Ukerewe, he urged him on no account to make the attempt. Mansur also did his best to dissuade him, and, boats not being obtainable, he was compelled to give up his design. Speke, arguing from the fact that the source of the Nile at the highest spot which had been reached, two thousand feet above the level of the sea, is considerably lower than the surface of the lake, which is four thousand feet, is of opinion that the waters of the lake must flow into it. The lake has, however, numerous feeders which flow from the Mountains of the Moon. Indeed, from that and several other reasons, he felt convinced that the lake is the real and long-looked-for source of the Nile. As no boats of any size were to be obtained, and having gained all the information he could, regretting that he was unable to extend his explorations, he bade the Sultan and his Arab friend adieu, and on the 6th of August commenced his return journey. The country through which he passed abounds in game. Elephants are finer here than in any other part of the world, and some have tusks exceeding five hundred pounds the pair in weight. The people are mostly agricultural; and when a stranger comes among them, they welcome him, considering his advent as a good omen, and allow him to do what he likes. His black attendants were in much better humour on the return journey, as they were now going home, and, as the country was well stocked with cattle, they could obtain as much meat as was required. One village through which he passed, being full of sweet springs, had a dense population possessing numerous herds of cattle. "If they were ruled by a few score of Europeans, what a revolution a few years would bring forth! An extensive market would be opened to the world, and industry and commerce would clear the way for civilisation and enlightenment," Speke remarks.