The north-western part of the African continent is traversed by a lofty and extensive mountain range, which is known to us by its classic name of ATLAS. On the northern and western sides, these ridges extend to the sea, forming by their projections numerous capes and promontories, which have been the dread of navigators in every age. On the south, they in many places disappear as abruptly in the great ocean of sand called _Zahara_, or the Desert, which stretches across the continent, from the Atlantic to the valley of the Nile, and the shores of the Mediterranean; the descent is, however, generally gradual, leaving tracts of productive soil between the steeps and the desert; these tracts, though not adapted for the growth of grain, are so highly favorable to the Palm, that they are known by the name of Bilad-oul-jerrid, or the Country of Dates. The mountains are highest and most continuous in the west; towards the east they become gradually lower, and there are many breaks in the chain, through which the sand makes its way from the desert; at length they disappear entirely beyond the great bend which the coast of the Mediterranean makes to the southward near Tripoli; and the sand having no barrier to check its advances, is rolled by the prevailing southerly winds to the shores of the sea. Thus bounded and cut off from other habitable countries by sea and by sand, the region of the Atlas may be considered as one vast island; and these circumstances of its situation should ever be borne in mind, in moral or political speculations concerning it. Hence it was, that civilization did not gradually overspread it from the east, and that it could only be colonized by maritime powers; that neither the Egyptians, the Persians, nor the Macedonians effected its conquest, as they neither possessed adequate fleets, nor troops accustomed to the peculiar difficulties and dangers of the desert; and that the Arabs alone, a people bred among trackless wastes of sand, ventured to invade it without assistance from the sea. Indeed the little that is known of the geology of northern Africa, encourages the supposition that at some past period this country was encircled by water; and ingenious attempts have been made to prove that it was in reality the famed island of Atlantis, which was vainly sought by the ancient navigators in the ocean beyond the Pillars of Hercules.