History of the Peloponnesian War
Thucydides
Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.
And in the battle his cavalry attacked the left wing of the Athenians, which was opposed to them, and routed it; and in consequence of this the rest of the army also was beaten by the Syracusans and driven headlong within the fortifications.
And the following night they succeeded in building their wall beyond the works of the Athenians and in getting past, so that they themselves were no longer hampered by them, and had altogether deprived the Athenians, even if they should be victorious, of the possibility of ever investing them.
After this the remaining twelve ships of the Corinthians, Ambraciots, and Leucadians,[*](cf. 7.2.7; 7.4.7; also 6.104.1.) which were under the command of Erasinides, a Corinthian, sailed into the harbour, eluding the watch kept by the Athenians, and helped the Syracusans to build the rest of their cross-wall.