History of the Peloponnesian War

The blockade in all, counting from the fight at sea to the battle in the island, had lasted seventy-two days.

For twenty of these, during the absence of the envoys sent to treat for peace, the men had provisions given them, for the rest they were fed by the smugglers. Corn and other victual was found in the island; the commander Epitadas having kept the men upon half rations.

The Athenians and Peloponnesians now each withdrew their forces from Pylos, and went home, and crazy as Cleon's promise was, he fulfilled it, by bringing the men to Athens within the twenty days as he had pledged himself to do.