Henry Morton Stanley the source of the Nile. Between 1875 and 1876 Stanley succeeded in the first part of his objective, establishing that Lake Victoria had only a single outlet – the one located by John Hanning Speke on 21 July 1862. If this was not the Nile's source, then the massive northward flowing river called by Livingstone, the Lualaba, and mapped by him in its upper reaches, might flow on north to connect with the Nile via Lake Albert and thus be the primary source. It was therefore essential that Stanley should trace the course of the Lualaba downstream (northward) from Nyangwe,
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