History of the Peloponnesian War

They also removed the seven Chian vessels, which joined them in the blockade of Piraeus; and liberated the slaves who were on board of them, while the freemen they put in bonds. In the place of all the ships that had departed they speedily manned others, and sent them to observe the Peloponnesians, resolving at the same time to man thirty more. So great was their ardour; and no trivial measure was undertaken with regard to the forces they sent to Chios.