History of the Peloponnesian War
Thucydides
Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.
After these things, though not many years later, what we have before narrated now took place, namely, the affair of Corcyra, and that of Potidaea, and whatever was made a pretext for this war.