=20.= The highlands of south-western Asia contained seventeen countries, of which only the most important will here be named. _Arme´nia_ has been called the Switzerland of Western Asia. Its highest mountain is Ar´arat, 17,000 feet above the sea-level. From this elevated region the Tigris and Euphrates take their course to the Persian Gulf; the Halys to the Euxine; the Arax´es and the Cyrus to the Caspian Sea. _Colchis_ lay east of the Euxine, upon one of the great highways of ancient traffic. It was celebrated, in very early times, for its trade in linen. _Media_ was a mountainous region, extending from the Araxes to the Caspian Gates. _Persia_ lay between Media and the Persian Gulf. Its southern portion is a sandy plain, rendered almost desert in summer by a hot, pestilential wind from the Steppes of Kerman. Farther from the sea, the country rises into terraces, covered with rich and well-watered pastures, and abounding in pleasant fruits. The climate of this region is delightful; but it soon changes, toward the north, into that of a sterile mountain tract, chilled by snows, which cover the peaks even in summer, and affording only a scanty pasturage to flocks of sheep. =21.= The lowland plain of south-western Asia comprised Syr´ia, Arabia, Assyr´ia, Susia´na, and Babylo´nia. _Syria_ occupied the whole eastern coast of the Mediterranean, and consisted of three distinct parts: (1) Syria Proper had for its chief river the Oron´tes, which flowed between the parallel mountain ranges of Lebanon and Anti-Lebanon. (2) Phœni´cia comprised the narrow strip of coast between Lebanon and the sea. (3) Palestine, south of Phœnicia, had for its river the Jordan, and for its principal mountains Hermon and Carmel. Syria becomes less fertile as it recedes from the mountains, and merges at last into a desert, with no traces of cities or of settled habitations. Yet even this sandy waste is varied by a few fertile spots. The site of Palmy´ra, “Queen of the Desert,” may be discerned even now in her magnificent ruins. In more prosperous days she afforded entertainment to caravans on their way from India to the coast of the Mediterranean. =22.= _Arabia_ is a vast extent of country south and east of Syria, lying between the Red Sea and the Persian Gulf. Though more than one-fourth the size of Europe, it was of little importance in ancient times; for its usually rocky or sandy soil sustained few inhabitants, and afforded little material for commerce.