David Livingstone many newspapers of the time, and Livingstone experienced great difficulty in raising funds to further explore Africa. Nevertheless, John Kirk, Charles Meller, and Richard Thornton, the scientists appointed to work under Livingstone, did contribute large collections of botanical, ecological, geological, and ethnographic material to scientific Institutions in the United Kingdom. In January 1866, Livingstone returned to Africa, this time to Zanzibar, and from there he set out to seek the source of the Nile. Richard Francis Burton, John Hanning Speke, and Samuel Baker had identified either Lake Albert or Lake Victoria as the source (which was partially correct, as the
John Hanning Speke Speke was much attached to Bombay and spoke highly of his honesty and conscientiousness. Bombay's efforts in dealing with hostile tribes, interpreting and keeping the safari crew on track was a great help to the expedition. Less is known of Mabruki, the other caravan leader, but he was later known as Mabruki Speke, and like Bombay became one of East Africa's great caravan leaders and was also a member of the Yao tribe like Bombay. Because of Speke's recommendations both Bombay and Mabruki served on Henry Stanley's 1871 expedition to find Livingstone. On 26 September 1859 the return journey from