1911 Encyclopædia Britannica (1911)
“ Even Speke (see below) congratulated himself on identifying the old Ptolemian range with the high lands to the north of Tanganyika, and connected the name with that of Unyamwezi, the “country of the moon.” In the fourteen centuries after Ptolemy virtually nothing was added to the knowledge of the geography of the Upper Nile. Arab writers of the 12th and 13th centuries make mention of the great lakes, and their reports served to revive the interest of Europe in the problem of the Nile. Idrisi made both the Nile and the Niger issue from a great lake, the Niger flowing west, the Nile north. ”
