For ourselves, however, it is necessary that we retain in our minds the opinions first stated, with regard to the form and dimensions of our earth; agreeing with those Muslims who allow not philosophy to trench upon revelation or sacred traditions. It is written, say they, that God hath "spread out the earth,"[18] "as a bed,"[19] and "as a carpet;"[20] and what is round or globular cannot be said to be spread out, nor compared to a bed, or a carpet. It is therefore decided to be an almost plane expanse. The continents and islands of the earth are believed by the Arabs (as they were by the Greeks in the age of Homer and Hesiod) to be surrounded by "the Circumambient Ocean," "el-Baḥr el-Moḥeeṭ;" and this ocean is described as bounded by a chain of mountains called Káf, which encircle the whole as a ring, and confine and strengthen the entire fabric. With respect to the extent of the earth, our faith must at least admit the assertion of the Prophet, that its width (as well as its depth or thickness) is equal to five hundred years' journey: allotting the space of two hundred to the sea, two hundred to uninhabited desert, eighty to the country of Yájooj and Májooj (or Gog and Magog), and the rest to the remaining creatures:[21] nay, vast as these limits are, we must rather extend than contract them, unless we suppose some of the heroes of this work to travel by circuitous routes. Another tradition will suit us better, wherein it is said, that the inhabited portion of the earth is, with respect to the rest, as a tent in the midst of a desert.[22] But even according to the former assertion, it will be remarked, that the countries now commonly known to the Arabs (from the western extremity of Africa to the eastern limits of India, and from the southern confines of Abyssinia to those of Russia,) occupy a comparatively insignificant portion of this expanse. They are situated in the middle; Mekkeh, according to some,--or Jerusalem, according to others,--being exactly in the centre. Adjacent to the tract occupied by these countries are other lands and seas, partially known to the Arabs. On the north-west, with respect to the central point, lies the country of the Christians, or Franks, comprising the principal European nations; on the north, the country of Yájooj and Májooj, before mentioned, occupying, in the maps of the Arabs, large tracts of Asia and Europe; on the north-east, central Asia; on the east, Eṣ-Ṣeen (or China); on the south-east, the sea, or seas, of El-Hind (or India), and Ez-Zinj (or Southern Ethiopia), the waves of which (or of the former of which) mingle with those of the sea of Eṣ-Ṣeen, beyond; on the south, the country of the Zinj; on the south-west, the country of the Soodán, or Blacks: on the west is a portion of the Circumambient Ocean, which surrounds all the countries and seas already mentioned, as well as immense unknown regions adjoining the former, and innumerable islands interspersed in the latter.