the reputed Lake of Nyasa.” Burton found, however, that the Arabs of Kilwa were strongly opposed to white men penetrating the interior in that direction. He therefore decided to choose the line of least resistance at Bagamoyo, and go along the now beaten track of the Arabs to Ujiji. When Burton and Speke reached Unyamwezi (Kaze) at the close of 1857, they were received with much kindness and courtesy by the Zanzibar Arabs established there, especially by Sheikh Snay, who had been the first Arab to reach Uganda. Snay promptly cleared up the mystery of the missionaries’ great lake, telling the explorers that it was three different lakes (Nyasa, Tanganyika, and Victoria) rolled into one. The Arabs had also heard through the Banyoro rumours of European vessels travelling up the White Nile to the Bari country. Burton was continually prostrated with fever during this stay in Unyamwezi, so that the command of the expedition and the solution of its difficulties temporarily devolved on Speke. The main trouble, as on all these expeditions, was with the question of transport. It was very difficult to obtain porters to proceed in any direction north or west of Unyamwezi. At last they induced a number of their paid-off men who had accompanied them through the coast lands to rejoin and convey the loads as far as Ujiji. In that way Burton and Speke discovered Lake Tanganyika, and Speke thought (wrongly) that in the great tilted plateau which they ascended on the east, and from which they looked down on the beautiful blue waters of the lake, he had discovered the Mountains of the Moon. After a somewhat half-hearted exploration of the northern portion of Tanganyika in an Arab dau, during which they heard and partially verified the fact that no river flowed out of Tanganyika on the north, but that the Rusizi flowed _into_ the lake[51] in that direction, they returned to Ujiji, and from this point made their way back to Kaze in Unyamwezi. Here Burton again became ill. Speke with some difficulty obtained from him permission to travel northwards in search of the Lake of Bukerebe. Burton yielded his consent reluctantly, and appears to have given but grudging assistance in the shape of men and guides. Full of energy, however, Speke gathered together a caravan, which crossed Unyamwezi and Usukuma, and on the 30th of July, 1858, he saw the Mwanza creek, one of the southernmost gulfs of the Victoria Nyanza. The extremity of this he named “Jordans Nullah.”[52] Travelling northwards along this creek, on August 3d (1858), early in the morning, Speke saw the open waters of a great lake with a sea horizon to the north. Much of the horizon was shut in by great and small islands, but Speke detected through their interstices the vast extent of open water which stretched to the north.