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 Oswell and Anna Mary married and had children. His one regret in later life was that he did not spend enough time with his children. The archives of David Livingstone are maintained by the Archives of the University of Glasgow (GUAS). On 11 November 2011, Livingstone's 1871 Field Diary, as well as other original works, was published online for the first time by the David Livingstone Spectral Imaging Project. Papers relating to Livingstone's time as a London Missionary Society missionary (including hand-annotated maps of South East Africa) are held by the Archives of the School of Oriental and African Studies.