History of the Peloponnesian War

And they, with such of their vessels as were seaworthy and all the rest that had not been engaged, together with the Attic ships, on their part also sailed to meet them, fearing that they would attempt to disembark on their territory.

It was now late and the paean had been sounded for the onset, when the Corinthians suddenly began to back water; for they sighted twenty Attic ships approaching, which the Athenians had sent out after the ten as a reinforcement, fearing just what happened, namely that the Corcyraeans would be defeated and their own ten ships would be too few to help them.