History of the Peloponnesian War

At Athens, meanwhile, the news that the army was in great distress, and that corn found its way in to the men in the island caused no small perplexity; and the Athenians began to fear that winter might come on and find them still engaged in the blockade. They saw that the convoying of provisions round Peloponnese would be then impossible. The country offered no resources in itself, and even in summer they could not send round enough. The blockade of a place without harbor could no longer be kept up; and the men would either escape by the siege being abandoned, or would watch for bad weather and sail out in the boats that brought in their corn.

What caused still more alarm was the attitude of the Lacedaemonians, who must, it was thought by the Athenians, feel themselves on strong ground not to send them any more envoys; and they began to repent having rejected the treaty.