History of the Peloponnesian War

The Boeotians and Corinthians, being charged by Xenares and Cleobulus and the Lacedaemonians that were friendly to them with these instructions, which they were to announce to their governments, now returned to their respective cities.

But two Argive men of highest official position, who were watching for them by the way as they went off, joined them and made a proposal to them, in the hope that the Boeotians might become allies to them, just as the Corinthians, Eleans, and Mantineans had done; for they thought, if this succeeded, they might then readily, all pursuing a common policy, carry on war or make peace with the Lacedaemonians, if they should wish, or with anyone else with whom it might be necessary.

The Boeotian envoys were pleased at hearing these things; for by good luck these men were asking the same things as their friends at Lacedaemon had enjoined upon them. And the Argive men, seeing that they were inclined to accept the proposal, told them they would send envoys to the Boeotians and went away.