European exploration of Africa 1840s, so that around the midpoint of the 19th century and the beginning of the colonial Scramble for Africa, the unexplored parts were now limited to what would turn out to be the Congo Basin and the African Great Lakes. This "Heart of Africa" remained one of the last remaining "blank spots" on world maps of the later 19th century (alongside the Arctic, Antarctic and the interior of the Amazon basin). It was left for 19th-century European explorers, including those searching for the famed sources of the Nile, notably John Hanning Speke, Sir Richard Burton, David Livingstone and Henry Morton
David Livingstone nearly his entire Kwena people. In the estimation of Neil Parsons of the University of Botswana, Sechele "did more to propagate Christianity in 19th-century southern Africa than virtually any single European missionary". Although Sechele was a self-proclaimed Christian, many European missionaries disagreed. The Kwena tribe leader kept rainmaking a part of his life as well as polygamy. David Livingstone died in 1873 at the age of 60 in Chief Chitambo's village at Ilala, southeast of Lake Bangweulu, in present-day Zambia, from malaria and internal bleeding due to dysentery. His loyal attendants Chuma and Susi removed his heart and buried it