History of the Peloponnesian War

And the building still slows even now that it was executed in haste; for the foundations are laid with stones of all kinds, and in some places not wrought together, but as the several parties at any time brought them to the spot: and many columns from tombs, and wrought stones, were worked up in them. For the enclosure of the city was carried out to a greater extent on every side; and for this reason they hurried on the work, removing every tiling alike.

Themistocles also persuaded them to build the remaining walls of the Piraeus, (they had been begun by him before, at the time of his office as archon, which he had held for a year over the Athenians,) thinking that the site was a fine one, as it contained three natural harbours; and that by becoming a naval people they would make a great advance towards the acquisition of power.