John Hanning Speke questions about the height and extent of the lake could not be answered easily. Speke's eyes were still bothering him and he only saw a small part of the southern end of the lake and his view was blocked by islands in the lake so he could not judge the size of the lake well. However, Speke did estimate the elevation of Lake Victoria at 4000 feet by observing the temperature at which water boiled at that level. (This lake's being substantially higher than Lake Tanganyika did make it a more likely candidate for the source of the Nile.) From
Misri legend School of anthropology, and would also influence proponents of polygenism. The British explorer John Hanning Speke popularized the ancient Hamitic peregrinations in his publications on his search for the source of the Nile River. Speke believed that his explorations uncovered the link between "civilized" North Africa and "primitive" central Africa. Describing the Ugandan Kingdom of Buganda, he argued that its "barbaric civilization" had arisen from a nomadic pastoralist race who had migrated from the north and was related to the Hamitic Oromo (Galla) of Ethiopia. In his "Theory of Conquest of Inferior by Superior Races" (1863), Speke would also attempt