History of the Peloponnesian War

it being impossible to haul up and careen the vessels, because those of the enemy, being more than equal in number, are continually causing expectation of their sailing against us.

For they are seen practising, and it rests with them to make the attack [when they please]; and they have greater facility of careening their ships, since they are not engaged in blockading others.

"We, on the other hand, could scarcely enjoy this advantage, though with a great superabundance of ships, and though we were not compelled, as at present, to keep guard with all of them. For if we relax our watching even in a slight degree, we shall have no provisions; since even now we find difficulty in bringing them in past their city.