History of the Peloponnesian War

But on the next day he led out the main body of his army and stationed it opposite the walls of the Athenians, in order to prevent their sending reinforcements to any other point; then, sending a detachment against the fort at Labdalum, he captured it and put to death all whom he took in it; for the place (it should be explained) was not within sight of the Athenians.

On the same day, too, an Athenian trireme that was keeping watch at the mouth of the Great Harbour was captured by the Syracusans.

After this the Syracusans and their allies proceeded to build a single wall running upwards from the city across Epipolae at an angle with the Athenian wall, in order that the Athenians, if they could not prevent its completion, might no longer be able to wall them off.