History of the Peloponnesian War

When Salaethus and the others arrived at Athens, the Athenians at once put Salaethus to death, although he offered among other things to induce the Peloponnesians to abandon Plataea, which was still under siege;

as to the others they held a debate, and under the impulse of anger finally determined to put to death, not only the Mytilenaeans who were there in Athens, but also all who were of adult age, and to enslave their women and children. The general charge which they brought against them was that they had made this revolt in spite of the fact that they were not held in subjection like the other allies; and what contributed not least to their fury was that the Peloponnesian fleet had dared to venture over to Ionia to their support; for from this they thought the revolt had been made after long deliberation.