...ce, as is the case with the Orontes in Syria, which sinks into the chasm (called Charybdis) between Apameia and Antiocheia and rises again forty stadia away. Similar, too, are the cases both of the Tigris in Mesopotamia and of the Nile in Libya, only a short distance from their sources. And the water in the territory of Stymphalus first flows underground for two hundred stadia and then issues forth...