Strabo, Geography

As for the Parthian country, it is not large; at any rate, it paid its tribute along with the Hyrcanians in the Persian times, and also after this, when for a long time the Macedonians held the mastery. And, in addition to its smallness, it is thickly wooded and mountainous, and also poverty stricken, so that on this account the kings send their own throngs through it in great haste, since the country is unable to support them even for a short time. At present, however, it has increased in extent. Parts of the Parthian country are Comisene and Chorene, and, one may almost say, the whole region that extends as far as the Caspian Gates and Rhagae and the Tapyri, which formerly belonged to Media. And in the neighborhood of Rhagae are the cities Apameia and Heracleia. The distance from the Caspian Gates to Rhagae is five hundred stadia, as Apollodorus says, and to Hecatompylus, the royal seat of the Parthians, one thousand two hundred and sixty. Rhagae is said to have got its name from the earthquakes that took place in that country, by which numerous cities and two thousand villages, as Poseidonius says, were destroyed. The Tapyri are said to live between the Derbices and the Hyrcanians. It is reported of the Tapyri that it was a custom of theirs to give their wives in marriage to other husbands as soon as they had had two or three children by them; just as in our times, in accordance with an ancient custom of the Romans, Cato gave Marcia in marriage to Hortensius at the request of the latter.