History of the Peloponnesian War

Now the Lacedaemonians happened to be celebrating a festival; and, moreover, when they heard it, they made light of it, thinking that when they took the field, either the enemy would not wait their attack, or they should easily take the place by storm. To a certain extent also the fact of their army being still before Athens delayed them.

So the Athenians, after fortifying in six days the side towards the interior, and what most required it, left Demosthenes there with five ships to protect the place, while with the main body of the fleet they hastened on their voyage to Corcyra and Sicily.