History of the Peloponnesian War

The Mitylenians made a sortie with all their forces against the Athenian camp; and a battle ensued, in which they gained some slight advantage, but retired notwithstanding, not feeling sufficient confidence in themselves to spend the night upon the field. After this they kept quiet wishing to wait for the chance of reinforcements arriving from Peloponnese before making a second venture, being encouraged by the arrival of Meleas, a Laconian, and Hermaeondas, a Theban, who had been sent off before the insurrection but had been unable to reach Lesbos before the Athenian expedition, and who now stole in in a trireme after the battle, and advised them to send another trireme and envoys back with them, which the Mitylenians accordingly did.

Meanwhile the Athenians, greatly encouraged by the inaction of the Mitylenians, summoned allies to their aid, who came in all the quicker from seeing so little vigor displayed by the Lesbians, and bringing round their ships to a new station to the south of the town, fortified two camps, one on each side of the city, and instituted a blockade of both the harbors.