History of the Peloponnesian War
Thucydides
Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.
The Lacedaemonians said that they had done what was possible; for that they had restored the Athenian prisoners who were in their hands, and had recalled the troops in Thrace; and whatever else they had in their power. With regard to Amphipolis, they were not, they said, masters of it, so as to give it up; but they would endeavour to bring the Boeotians and Corinthians over to the treaty, and to recover Panactum;
and would restore as many of the Athenians as were prisoners in Boeotia. They required, however, that they should restore Pylus to them; or if not that, should withdraw the Messenians and helots, as they, on their part, had withdrawn their troops from Thrace;
and that the Athenians themselves should garrison it, if they would. So when conferences had been held, many and often, during this summer, they prevailed on the Athenians to withdraw from Pylus the Messenians, and the rest of the helots, and all who had deserted from Laconia; and they settled them at Cranii in Cephallenia.
During this summer, then, there was peace and free intercourse with each other.