History of the Peloponnesian War

So when they were excluded from all hope by the severity of the law, and at the same time heard that Pithias was likely, while he was still in the council, to persuade the populace to hold as friends and foes the same as the Athenians did, they conspired together, and took daggers, and, having suddenly entered the council, assassinated Pithias and others, both counsellors and private persons, to the number of sixty. Some few, however, of the same party as Pithias, took refuge on board the Athenian trireme, which was still there.

Having perpetrated this deed, and summoned the Corcyraeans to an assembly, they told them that this was the best thing for them, and that so they would be least in danger of being enslaved by the Athenians; and they moved, that in future they should receive neither party, except coming in a quiet manner with a single ship, but should consider a larger force as hostile. As they moved, so also they compelled them to adopt their motion.

They likewise sent immediately ambassadors to Athens, to show, respecting what had been done, that it was for their best interests, and to prevail on the refugees there to adopt no measure prejudicial to them that there might not be any reaction.