David Livingstone many newspapers of the time, and Livingstone experienced great difficulty in raising funds to further explore Africa. Nevertheless, John Kirk, Charles Meller, and Richard Thornton, the scientists appointed to work under Livingstone, did contribute large collections of botanical, ecological, geological, and ethnographic material to scientific Institutions in the United Kingdom. In January 1866, Livingstone returned to Africa, this time to Zanzibar, and from there he set out to seek the source of the Nile. Richard Francis Burton, John Hanning Speke, and Samuel Baker had identified either Lake Albert or Lake Victoria as the source (which was partially correct, as the
Jakob Erhardt then in the "Church Missionary intelligencer" in 1856. The map was reproduced with commentary in other publications. The reports of snow on mounts Kilimanjaro and Kenya, near to the equator, caused considerable controversy. The map caused the British government and the Royal Geographical Society to hire Richard Francis Burton and John Hanning Speke to investigate the great lake, or lakes, and determine if they were the source of the Nile. The map came to be known as the "slug map" from the shape of the Uniamesi or Niassa inland sea. Burton called it the Mombas Mission Map. Erhardt worked in