--------------------------------------
Taken from : The Shaping of Africa: Cosmographic Discourse and Cartographic Science in Late Medieval and Early Modern Europe by Francesc Relano
The Saracens (1) call this mountain Gibelcamar (2), which in our language means the Mountain of the Moon; Is on the equinoctial line (3) and is so high that from the top you could see the two poles; Of this mountain go down rivers that form a lake in which gold is found and for that reason it is called river of Gold.
Note that the Mountains of the moon here are not the source of the Nile but of the Senegal River.
(1) Saracens: were primarily Arab Muslims, but also Turks, Persians or other Muslims as referred to by Christian writers in Europe during the Middle Ages.
(2) Gibelcamar: Jebel-qamar; Mountain of the Moon; the traditional source of the Nile.
(3) Equinoctial line: here the equatorial line.