The oldest subjects in the Median kingdom were the Persians. Their country lay in the south-west corner of the table-land of Iran. The heights of the Zagrus, which run down to the sea in a south-easterly direction, divide it from the ancient kingdom of Elam, and the land of the Tigris, just as in the north they divide the land of the Medes from the valley of the two rivers. The Eastern border of the Persian territory was formed, almost down to the coast, by the great desert, which fills the centre of Iran; the northern boundary towards the land of the Medes is marked by the range which the Greeks call Parachoatras; the name would be _Kuruhvathra_, _i.e._ very brilliant, in Old Persian. The southern boundary of Persia was the sea. Nearchus, who sailed along the coast of Persia, gives it an extent of 4400 stades, _i.e._ 550 miles; their land began at the mouth of the Oroatis (Old Persian, _Aurvaiti_, _i.e._ the swift),[505] the Tsab, which falls into the Persian Gulf below the modern Hindian, and reached to the east almost as far as the entrance into this gulf, where it ended opposite the island of Coloë (Kishm).[506] Euripides contrasts the sun-lit mountain flats of Persia with the wintry land of Media and the citadels of Bactria.[507] According to Strabo the coast of Persia was hot and sandy, and, with the exception of some palms, produced no fruit. But beyond the coast was a land of very great fertility, abounding in lakes and rivers, and providing the most excellent pasture. Further to the north, the Persian land became cold and mountainous, and supported nothing but droves of camels and their keepers. Arrian tells us that to the north of the coast of Persia the air was temperate, and the land traversed by the clearest streams, in addition to which there were also lakes; the meadows were grassy and well watered, and provided excellent pastures for horses and other beasts of draught. The soil produced all kinds of fruits and even wine, but not olives. The forests were extensive and rich in game, and all kinds of water-fowl were to be found there. But further to the north the land of the Persians was wintry and full of snow.[508] What the Greeks relate of the desolation of the Persian coast is still applicable; it consists of naked sand-flats, broken only by scanty groves of palms. Above this coast the soil rises in terraces, which are separated from each other by yet higher ranges. Further to the north the slopes of the mountains provide excellent pastures, till the ground becomes more bare as we approach Media, while on the east it gradually passes into the great desert of the centre. On the mountain terraces and in the depressions between them are some favoured lands and valleys. The warmth of the southern situation is tempered by the elevation of the soil and the winds blowing from the sea. This happy climate allows a perpetual spring to reign, and increases the fertility which the abundant mountain springs produce in such a degree that