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 the British. Partly as a result, within 50 years of his death, colonial rule was established in Africa, and white settlement was encouraged to extend further into the interior. However, what Livingstone envisaged for "colonies" was not what we now know as colonial rule, but rather settlements of dedicated Christian Europeans who would live among the people to help them work out ways of living that did not involve slavery. Livingstone was part of an evangelical and nonconformist movement in Britain which during the 19th century helped change the national mindset from the notion of a divine right to rule