History of the Peloponnesian War

Now Astyochus, the Lacedaemonian admiral, set sail, as he had intended, with four ships from Cenchrea, and arrived at Chios On the third day after his coming there, the Athenian ships, five and twenty in number, sailed to Lesbos under the command of Leon and Diomedon; for Leon had subsequently brought a reinforcement of ten ships from Athens.

The same day, at a late hour, Astyochus also put out, and taking one Chian vessel in addition to his own, sailed to Lesbos, to render it whatever assistance he could. Accordingly he came to Pyrrha, and thence the next day to Eresus, where he heard that Mitylene had been taken by the Athenians on the first assault.

For the Athenians, immediately on sailing to the place, unexpectedly put into the harbour, and defeated the Chian ships; and having landed, and conquered in a battle those who opposed them, they took possession of the city.

Receiving this intelligence, both from the Eresians and from the Chian ships coming from Methymna with Eubulus, three of which fell in with him, (for one had been taken by the Athenians,) after being left behind at the time, and so escaping when Mitylene was taken, Astyochus no longer advanced to Mitylene, but having persuaded Eresus to revolt, and supplied it with arms, he both sent the heavy-armed from on board his own ships to Antissa and Methymna, having appointed Eteonicus to the command, and himself coasted along thither with his own ships and the three Chians; hoping that the Methymnaeans would be encouraged by the sight of them, and persevere in their revolt.