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.
As they skirted the coast they touched at Cephallenia, where they made a descent upon the territory of the Cranians; here deceived by the inhabitants through some sort of agreement they lost a few of their men by an unexpected attack of the Cranians, and finally, after they had got out to sea with considerable difficulty, managed to get back home.