In Darkest Africa: The Quest, Rescue, and Retreat of Emin Governor of Equatoria

This was to be Stanley's last expedition to Africa. He was charged with rescuing Emin Pasha (Viceroy), who had been appointed a governor in the southern Sudan by the British, and had been forced to retreat to the Lake Albert (now northern Uganda) by the uprising led by an Islamic holy man. In 1888 Stanley journeyed up the Congo and to the lake, reaching Emin, who refused to leave. Eventually persuaded by Stanley, they proceeded to the Indian Ocean by way of the Semliki River which was found to connect Lake Albert with Lake Edward. This work is in two volumes.