Ab urbe condita
Titus Livius (Livy)
Livy. History of Rome, Volumes 1-2. Roberts, Canon, Rev, translator. London, New York: J. M. Dent and Sons; E. P. Dutton and Co., 1912.
Then peace was made. Works[*](Undertakings in Rome.) of peace were now commenced with greater energy even than had been displayed in war, so that the people enjoyed no more quiet at home than they had had in the field.
He made preparations for completing the work, which had been interrupted by the Sabine war, of enclosing the City in those parts where no fortification yet existed with a stone wall. The low-lying parts of the City round the Forum, and the other valleys between the hills, where the water could not escape, were drained by conduits which emptied into the Tiber.