History of the Peloponnesian War

At first the Lacedaemonians trusted the words of Themistocles, through their friendship for him; but when others arrived, all distinctly declaring that the work was going on and already attaining some elevation, they did not know how to disbelieve it.

Aware of this, he told them that rumors are deceptive, and should not be trusted; they should send some reputable persons from Sparta to inspect, whose report might be trusted.

They despatched them accordingly. Concerning these Themistocles secretly sent word to the Athenians to detain them as far as possible without putting them under open constraint, and not to let them go until they had themselves returned. For his colleagues had now joined him, Abronichus, son of Lysicles, and Aristides, son of Lysimachus, with the news that the wall was sufficiently advanced; and he feared that when the Lacedaemonians heard the facts, they might refuse to let them go.

So the Athenians detained the envoys according to his message, and Themistocles had an audience with the Lacedaemonians, and at last openly told them that Athens was now fortified sufficiently to protect its inhabitants; that any embassy which the Lacedaemonians or their allies might wish to send to them, should in future proceed on the assumption that the people to whom they were going was able to distinguish both its own and the general interests.

That when the Athenians thought fit to abandon their city and to embark in their ships, they ventured on that perilous step without consulting them; and that on the other hand, wherever they had deliberated with the Lacedaemonians, they had proved themselves to be in judgment second to none.

That they now thought it fit that their city should have a wall, and that this would be more for the advantage of both the citizens of Athens and the Hellenic confederacy;

for without equal military strength it was impossible to contribute equal or fair counsel to the common interest. It followed, he observed, either that all the members of the confederacy should be without walls, or that the present step should be considered a right one.