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.
At the present time, then, we have discontinued our work of circumvallation on account of the superior numbers of the enemy and are keeping quiet; for we cannot use our whole army because the guarding of the walls has absorbed a part of our heavy-armed force. The enemy meanwhile have built a single wall past ours, so that it is no longer possible to invest them, unless one should assault this counter-wall with a large force and take it.
So it has turned out that we, who are supposed to be besieging others, are rather ourselves under siege, at least by land; for we cannot even go far into the country because of their cavalry.
"And they have also sent envoys to the Peloponnesus for another army, and Gylippus has gone to the cities of Sicily, to persuade such of them as are now neutral to join them in the war, and to bring from other cities, if he can, still further reinforcements for his army and navy.
For they plan, as I hear, to make an attempt upon our walls with their land-force and at the same time to try their luck at sea also with their fleet.
And let it not seem incredible to any of you that they will try also by sea. For our fleet, as the enemy also have learned, though at first it was in prime condition as regards both the soundness[*](Lit. “dryness,” as opposed to a water-logged condition (διάβροχοι).) of the ships and the unimpaired condition of the crews, is not so now; the ships are water-logged, from having been at sea for so long a time already, and the crews have wasted away.