Major explorations after the Age of Discovery to locate the source of the River Nile. Expeditions by Burton and Speke (1857–1858) and Speke and Grant (1863) located Lake Tanganyika and Lake Victoria. It was eventually proved to be the latter from which the Nile flowed. Explorers were also active in other parts of the continent. Southern Morocco, the Sahara and the Sudan were traversed in many directions between 1860 and 1875 by Georg Schweinfurth and Gustav Nachtigal. These travellers not only added considerably to geographical knowledge, but obtained invaluable information concerning the people, languages and natural history of the countries in which they sojourned. Among the discoveries
John Hanning Speke from Zanzibar in October 1860. The expedition approached the lake from the south west but Grant was often sick and was not able to travel with Speke much of the time. As during the first trip, in this period of history, Arab slave traders had created an atmosphere of great distrust towards any foreigners entering central Africa, and most tribes either fled or fought when encountering them as they assumed all outsiders to be potential slavers. Lacking a great deal of guns and soldiers, the only thing the expedition could do was make peace offerings to locals, and both men