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 an appendix in his own book on his travels to Harrar. It seemed unlikely that the two would join again and Burton believed that he would not lead an expedition to the interior of Africa, his fervent hope, after this failed journey. In 1856, Speke and Burton went to East Africa to find the Great Lakes, which were rumored to exist in the center of the continent. It was hoped that the expedition would locate the source of the Nile. The journey, which started from Zanzibar Island in June 1857, was extremely strenuous and both men fell ill from a