...evied customs on ships sailing into the Pontus, —and then drift down the current, which carries them as a matter of course to Byzantium. And the same is the case with a voyage on either side of Byzantium . For if a man is running before a south wind from the Hellespont, or to the Hellespont from the Pontus before the Etesian winds, if he keeps to the European shore, he has a direct and easy course to ...