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 with Burton going to Harrar, Abyssinia, and Speke going to Wadi Nogal in Somaliland . During this trip Speke experienced trouble with the local guide who cheated him and after they returned to Aden, Burton who had also returned, saw that the guide was punished and jailed and killed. This incident probably led to larger troubles later on. Now all 4 men traveled to Berbera on the coast of Somaliland from where they wanted to trek inland towards the Ogaden. While camped outside Berbera they were attacked at night by 200 spear wielding Somalis. During this fracas Speke ducked under