History of the Peloponnesian War

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.

The Lacedaemonians did not betray any open signs of anger against the Athenians at what they heard. The embassy, it seems, was prompted not by a desire to obstruct, but to guide the counsels of their government: besides, Spartan feeling was at that time very friendly towards Athens on account of the patriotism which she had displayed in the struggle with the Mede. Still the defeat of their wishes could not but cause them secret annoyance. The envoys of each state departed home without complaint.

In this way the Athenians walled their city in a little while.