Henry Morton Stanley the source of the Nile. Between 1875 and 1876 Stanley succeeded in the first part of his objective, establishing that Lake Victoria had only a single outlet – the one located by John Hanning Speke on 21 July 1862. If this was not the Nile's source, then the massive northward flowing river called by Livingstone, the Lualaba, and mapped by him in its upper reaches, might flow on north to connect with the Nile via Lake Albert and thus be the primary source. It was therefore essential that Stanley should trace the course of the Lualaba downstream (northward) from Nyangwe,
Bob Rafelson "Black Widow" are the joys of a film well made--the cinematography of Conrad Hall, the production design of Gene Callahan, and a fabulous cast," which also featured Dennis Hopper, Nicol Williamson, and Diane Ladd. In 1990 Rafelson directed "Mountains of the Moon", a film about the 1857–58 journey of Richard Francis Burton and John Hanning Speke in their expedition to central Africa — the project that culminated in Speke's discovery of the source of the Nile River. It starred Patrick Bergin as Burton and Iain Glen as Speke, and was hailed by critic Roger Ebert as "completely absorbing." Ebert continued,