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.

Indeed, as to the events of the period just preceding this, and those of a still earlier date, it was impossible to get clear information on account of lapse of time; but from evidence which, on pushing my inquiries to the furthest point, I find that I can trust, I think that they were not really great either as regards the wars then waged or in other particulars.