History of the Peloponnesian War
Thucydides
Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.
During this same winter the Athenians also were making their preparations to build ships, in accordance with their decision, and for this they had collected timber; and they fortified Sunium, in order that there might be protection for their grain-ships as they rounded the promontory. Furthermore, they abandoned the fortress in Laconia[*](cf. 7.26.2.) which they had built as they sailed along the Peloponnesian coast toward Sicily; and in general, if there seemed to be any useless expenditure anywhere, they retrenched in order to save money; but above all they kept an eye on their allies, that they might not revolt from them.
While both sides were carrying out these measures and busily equipping themselves for the war precisely as if they were just beginning it, first of all the Euboeans in the course of this winter sent envoys to Agis to discuss revolting from Athens. Receiving their proposals, he summoned from Lacedaemon Alcamenes son of Sthenelaïdas and Melanthus to take command in Euboea, and they came with about three hundred neodamodes,[*](The clans of new citizens formed of Helots emancipated for service in war. Cf. 5.34.1; 7.19.3.) while Agis began arranging for their crossing. But in the meantime the Lesbians also came, they also desiring to revolt;