History of the Peloponnesian War

For the Syracusan ships that were fighting before the mouth of the harbour, having forced their way through those of the Athenians, sailed in without any order, and being entangled with one another, transferred the victory to the Athenians; who routed both these, and those by which they were at first being defeated in the harbour.

They also sank eleven of the Syracusan ships, killing most of the men on board of them, excepting those whom they took prisoners from three vessels; while on their own side three ships were lost. After hauling up the wrecks of the Syracusans, and erecting a trophy on the small island in front of Plemyrium, they withdrew to their own encampment.

But although the Syracusans had thus fared with regard to the sea-fight, they were still in possession of the three forts on Plemyrium, and erected three trophies for them. One of the two forts last taken they razed, but the other two they repaired, and held with garrisons.