History of the Peloponnesian War

When the news of what had happened at Euboea reached the Athenians, a greater consternation was felt by them than had ever been before. For neither had the disaster in Sicily, though it appeared a great one at the time, nor any other event, ever yet alarmed them so much.

For when, after their army at Samos had revolted from them, and they had no more ships nor men to go on board them, while they were in a state of sedition, and did not know when they might break out into conflict with one another; [when, I say, under such circumstances] so great a calamity had befallen them—one in which they had lost their fleet, and, what was most of all, Euboea, from which they derived more advantages than from Attica—how could their dejection be unnatural?

But what especially and most immediately alarmed them, was the thought that the enemy would venture, on the strength of their victory, to sail straightway to the attack of their port Piraeus, while it had no ships for its protection;