History of the Peloponnesian War

Meanwhile the Athenian ships from Zacynthus arrived, fifty in number; for they were reinforced by some of the guard-ships at Naupactus, and four Chians.

When they saw both the mainland and the island crowded with heavy-armed, and the ships in the harbour, and not sailing out of it; being at a loss where to get anchorage, they sailed at the time to the island of Prote, which is not far off, and is uninhabited, and there they passed the night. The next day they weighed anchor in readiness for an engagement in the open sea, should the enemy be disposed to put out to meet them there; if not, intending to sail in and attack them.

They, however, neither put out to meet them, nor had done what they had intended, viz. to bar the entrances; but remaining quiet on shore, were manning their ships, and preparing, in case of any one's sailing in, to engage in the harbour, which is of no small extent.

The Athenians, on perceiving this, advanced against them by each entrance; and finding most of their ships already afloat and drawn up to meet them, they attacked and put them to flight, and chasing them as well as the short distance permitted, disabled many, and took five, one of them with its crew; while the rest they charged after they had taken refuge under the land. Some too were battered while still being manned, before they got under weigh; while others they lashed to their own, and began to tow off empty, the crews having taken to flight.