These _terrae incognitae_ are the scenes of some of the greatest wonders described in the "Thousand and One Nights;" and are mostly peopled with Jinn (Genii). On the Moḥeeṭ, or Circumambient Ocean, is the ´Arsh Iblees, or Throne of Iblees: in a map accompanying my copy of the work of Ibn-El-Wardee, a large yellow tract is marked with this name, adjoining Southern Africa. The western portion of the Moḥeeṭ is often called "the Sea of Darkness" (Baḥr eẓ-Ẓulumát, or, Baḥr eẓ-Ẓulmeh). Under this name (and the synonymous appellation of el-Baḥr el-Muzlim) the Atlantic Ocean is described by the author just mentioned; though, in the introduction to his work, he says that the Sea of Darkness surrounds the Moḥeeṭ. The former may be considered either as the western or the more remote portion of the latter. In the dark regions (Eẓ-Ẓulumát, from which, perhaps, the above-mentioned portion of the Moḥeeṭ takes its name),[106] in the south-west quarter of the earth, according to the same author, is the Fountain of Life, of which El-Khiḍr[107] drank, and by virtue of which he still lives and will live till the day of judgment. This mysterious person, whom the vulgar and some others regard as a prophet and identify with Ilyás (Elias, Elijah), and whom some confound with St. George, was, according to the more approved opinion of the learned, a just man or saint, the Wezeer and counsellor of the first Dhu-l-Ḳarneyn, who was a universal conqueror, but an equally doubtful personage, contemporary with the patriarch Ibráheem (Abraham). El-Khiḍr is said to appear frequently to Muslims in perplexity, and to be generally clad in green garments; whence, according to some, his name (which signifies "green"). The Prophet Ilyás is also related to have drunk of the Fountain of Life. During the day-time, it is said, El-Khiḍr wanders upon the seas, and directs voyagers who go astray; while Ilyás perambulates the mountains or deserts, and directs persons who chance to be led astray by the Ghools: but at night they meet together, and guard the rampart of Yájooj and Májooj,[108] to prevent these people from making irruptions upon their neighbours. Both, however, are generally believed by the modern Muslims to assist pious persons in distress in various circumstances, whether travelling by land or by water.