History of the Peloponnesian War

Meanwhile the Chians and Pedaritus, undeterred by the backwardness of Astyochus, went on sending messengers pressing him to come with all the fleet to assist them against their besiegers, and not to leave the greatest of the allied states in Ionia to be shut up by sea and overrun and pillaged by land.

There were more slaves at Chios than in any one other city except Lacedaemon, and being also by reason of their numbers punished more rigorously when they offended, most of them when they saw the Athenian armament firmly established in the island with a fortified position, immediately deserted to the enemy, and through their knowledge of the country did the greatest mischief.