An attractive map focused on the fictitious Ptolemaic twin lakes of Zaire and Zaflan that were purported to be the source of the Nile, located at the foot of the mythical Lunae Montes, or Mountains of the Moon, often identified as the Ruwenzori Mountains in Uganda. The map is filled with fictitious place names and topography, all meticulously detailed and engraved by Antoine de Winter for an uncommon Dutch edition.