History of the Peloponnesian War

The Boeotians and Corinthians, being dismissed by 37enares and Cleobulus, and all the other Lacedaemonians of that faction, with these points to be delivered to their commonwealths, went to their several cities.

And two men of Argos, of principal authority in that city, having waited for and met with them by the way, entered into a treaty with them about a league between the Argives and the Boeotians as there was between them and the Corinthians and the Eleians and Mantineans already; for they thought, if it succeeded, they might [the more] easily have either war or peace (forasmuch as the cause would now be common), either with the Lacedaemonians or whomsoever else it should be needful. When the Boeotian ambassadors heard this, they were well pleased.

For as it chanced, the Argives requested the same things of them, that they by their friends in Lacedaemon had been sent to procure of the Argives. These men therefore of Argos, when they saw that the Boeotians accepted of the motion, promised to send ambassadors to the Boeotians about it, and so departed.