History of the Peloponnesian War

Gylippus, when he had drawn his men of arms farther without the walls than he had done before, gave the onset. His horsemen and darters he placed upon the flank of the Athenians, in ground enough, to which neither of their walls extended.

And these horsemen, after the fight was begun, charging upon the left wing of the Athenians next them, put them to flight; by which means the rest of the army was by the Syracusians overcome likewise and driven headlong within their fortifications.

The night following, the Syracusians brought up their wall beyond the wall of the Athenians so as they could no longer hinder them, but should be utterly unable, though masters of the field, to enclose the city.

After this, the other twelve galleys of the Corinthians, Ambraciotes, and Leucadians, undescried of the Athenian galleys that lay in wait for them, entered the haven, under the command of Erasinides, a Corinthian, and helped the Syracusians to finish what remained to the cross wall.