As I was about to circumnavigate the Tanganika with my boat, and would probably be absent two or three months, I thought there might still be a chance of obtaining them, before setting out westward, by despatching messengers to Unyanyembé. Announcing my intentions to the governor, I obtained a promise that he would collect other men, as he and several Arabs at Ujiji were also anxious to communicate with their friends. Manwa Sera therefore selected five of the most trustworthy men, the Arabs also selected five of their confidential slaves, and the ten men started for Unyanyembé on the 3rd of June.[1] Footnote 1: My five trustworthy men arrived at Unyanyembé within fifteen days, but from some cause they never returned to the Expedition. We halted at Ujiji for seventy days after their departure, and when we turned our faces towards Nyangwé, we had given up all hopes of hearing from civilisation. Before departing on the voyage of circumnavigation of Lake Tanganika, many affairs had to be provided for, such as the well-being of the Expedition during my absence, distribution of sufficient rations, provisioning for the cruise, the engagement of guides, &c. The two guides I obtained for the lake were Para, who had accompanied Cameron in March and April 1874, and Ruango, who accompanied Livingstone and myself in December 1871 to the north end of Lake Tanganika. The most interesting point connected with this lake was its outlet. Before starting from Zanzibar, I had heard that Cameron had discovered the outlet to Lake Tanganika in the Lukuga river, which ran through Uguha to the west, and was therefore an affluent of Livingstone’s great river. In Commander Cameron’s book, vol. i. p. 305, the following sentences, bearing upon what he personally saw of the Lukuga, are found: “In company with the chief, I went four or five miles down the river, until navigation was rendered impossible, owing to the masses of floating vegetation. Here the depth was 3 fathoms, breadth 600 yards, current 1½ knots, and sufficiently strong to drive us well into the edge of the vegetation. I noticed that the embouchures of some small streams flowing into the river were unmistakably turned from the lake, and that the weed set in the same direction. Wild date-palms grew thickly down the river.” In opposition to this statement of Cameron’s was the evidence taken by me at Ujiji. Para, his guide, said that the white man could not have seen the river flowing towards Rua, because it did not. Ruango, the veteran guide, declared that he had crossed it five times, that it was a small river flowing into the Tanganika, and that if I found it to flow in a contrary direction, he would return me all his hire. Natives from the Lukuga banks whom we found in Ujiji asserted positively that there were two Lukugas, one flowing into Lake Tanganika, the other into Rua.