6. So that they still worship and honour Arsaces as a god, and down to our day have given him so much honour that, in conferring the royal power, one of his race has been always preferred to any one else. And also in intestine quarrels, such as are common in that nation, every one avoids as sacrilege wounding any descendant of Arsaces, whether in arms or living as a private individual. 7. It is well known that this nation, after subduing many others by force, extended its dominions as far as the Propontis and Thrace; but that it subsequently became diminished and suffered great disasters, owing to the arrogance of its ambitious monarchs, who carried their licentious inroads into distant countries. First, in consequence of the conduct of Cyrus, who crossed the Bosphorus with a fabulous host, but was wholly destroyed by Tomyris, queen of the Scythians, who thus terribly avenged her sons. 8. After him, when Darius, and subsequently Xerxes, changed the use[140] of the elements and invaded Greece, they had nearly all their forces destroyed by land and sea, and could scarcely escape in safety themselves. I say nothing of the wars of Alexander, and of his leaving the sovereignty over the whole nation by will to his successor. 9. Then, a long time after these events, while our republic was under consuls, and was afterwards brought under the power of the Cæsars, that nation was constantly warring with us, sometimes with equal fortune; being at one time defeated, and at another victorious. 10. Now I will in a few words describe the situation and position of the country as well as I can. It is a region of great extent both in length and breadth, entirely surrounding on all sides the famous Persian gulf with its many islands. The mouth of this gulf is so narrow that from Harmozon, the promontory of Carmania, the opposite headland, which the natives call Maces, is easily seen. 11. When the strait between these capes is passed, and the water becomes wider, they are navigable up to the city Teredon, where, after having suffered a great diminution of its waters, the Euphrates falls into the sea. The entire gulf, if measured round the shore, is 20,000 furlongs, being of a circular form as if turned in a lathe. And all round its coasts are towns and villages in great numbers; and the vessels which navigate its waters are likewise very numerous. 12. Having then passed through this strait we come to the gulf of Armenia on the east, the gulf of Cantichus on the south, and on the west to a third, which they call Chalites.[141] These gulfs, after washing many islands, of which but few are known, join the great Indian Ocean, which is the first to receive the glowing rising of the sun, and is itself of an excessive heat.