Exploration of the Caspian.—The Chaldaean Soothsayers. After this, Alexander sent Heraclides, son of Argaeus, into Hyrcania in command of a company of shipwrights, with orders to cut timber from the Hyrcanian mountains and with it to construct a number of ships of war, some without decks and others with decks after the Grecian fashion of ship-building.917 For he was very desirous of discovering with what sea the one called the Hyrcanian or Caspian unites; whether it communicates with the water of the Euxine Sea, or whether the Great Sea comes right round from the Eastern Sea, which is near India and flows up into the Hyrcanian Gulf; just as he had discovered that the Persian Sea, which was called the Red Sea, is really a gulf of the Great Sea.918 For the 401sources of the Caspian Sea had not yet been discovered, although many nations dwell around it, and navigable rivers discharge their waters into it. From Bactria, the Oxus, the largest of Asiatic rivers, those of India excepted, discharges itself into this sea919; and through Scythia flows the Jaxartes.920 The general account is, that the Araxes also, which flows from Armenia, falls into the same sea.921 These are the largest; but many others flow into these, while others again discharge themselves directly into this sea. Some of these were known to those who visited these nations with Alexander; others are situated towards the farther side of the gulf, as it seems, in the country of the Nomadic Scythians, a district which is quite unknown.
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