In the year 1865 "the greatest of all African travellers" started on his last journey to central Africa. "I hope," he said, "to ascend the Rovuma, and shall strive, by passing along the northern end of Lake Nyassa and round the southern end of Lake Tanganyika, to ascertain the watershed of that part of Africa." Arrived at Zanzibar in January 1866, he reached the mouth of the Rovuma River some two months later, and, passing through dense thickets of trees, he started on his march along the northern bank. The expedition consisted of thirteen sepoys from Bombay, nine negroes from one of the missions, two men from the Zambesi, Susi, Amoda, and others originally slaves freed by Livingstone. As beasts of burden, they had six camels, three Indian buffaloes, two mules, four donkeys, while a poodle took charge of the whole line of march, running to see the first man in the line and then back to the last, and barking to hasten him up. "Now that I am on the point of starting on another trip into Africa," wrote Livingstone from Rovuma Bay, "I feel quite exhilarated. The mere animal pleasure of travelling in a wild, unexplored country is very great. Brisk exercise imparts elasticity to the muscles, fresh and healthy blood circulates through the brain, the mind works well, the eye is clear, the step firm, and a day's exertion makes the evening's repose thoroughly enjoyable." But misfortunes soon began. As they marched along the banks of the Rovuma the buffaloes and camels were badly bitten by the tsetse fly, and one after another died. The cruelty of the followers to the animals was terrible. Indeed, they were thoroughly unsatisfactory. One day a party of them lagged behind, killed the last young buffalo, and ate it. They told Livingstone that it had died and tigers had come and devoured it. "Did you see the stripes of the tiger?" asked Livingstone. Yes; all declared that they had seen them distinctly--an obvious lie, as there are no striped tigers in Africa. On 11th August, Livingstone once more reached Lake Nyassa. "It was as if I had come back to an old home I never expected again to see, and pleasant it was to bathe in the delicious waters again. I feel quite exhilarated."