History of the Peloponnesian War

At present, therefore, we have ceased working at our line of circumvallation, in consequence of the enemy's numbers, and are lying still; (for we should not, indeed, be able to avail ourselves of all our force, since the guarding of our lines has exhausted a considerable part of our heavy-armed;) while they, on the other hand, have carried past us a single wall, so that it is no longer possible to invest them, unless one should assault this counter-work with a large force, and take it.