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
John Hanning Speke "race" comprised many tribes, including the Watusi (Tutsi). Speke described their physical appearances as having retaineddespite the hair-curling and skin-darkening effects of intermarriage"a high stamp of Asiatic feature, of which a marked characteristic is a bridged instead of bridgeless nose". Two species of African reptiles are named in his honor: Speke's hinge-back tortoise, "Kinixys spekii"; and Speke's sand lizard, "Heliobolus spekii". Two species of antelope are named in his honor; "Tragelaphus spekii" and "Gazella spekei". The film "Mountains of the Moon" (1990), starring Scottish actor Iain Glen as Speke, related the story of the Burton-Speke controversy, portrayed as having been