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.
The alarm was as great in the City as in the country districts. The consul Julius disposed his troops on the rampart and the walls; Verginius convened the senate in the temple of Quirinus.
They decreed that Q. Servilius should be nominated Dictator. According to one tradition he was surnamed Priscus, according to another, Structus. Verginius waited till he could consult his colleague; on gaining his consent, he nominated the Dictator at night. The Dictator appointed Postumius Aebutius Helva as Master of the Horse.
The Dictator issued an order for all to muster outside the Colline gate by daybreak. Every man strong enough to bear arms was present. The standards were quickly brought to the Dictator from the treasury. While these arrangements were being made, the enemy withdrew to the foot of the hills.
The Dictator followed them with an army eager for battle, and engaged them not far from Nomentum. The Etruscan legions were routed and driven into Fidenae; the Dictator surrounded the place with lines of circumvallation.
But, owing to its elevated positron and strong fortifications, the city could not be carried by assault, and a blockade was quite ineffective, for there was not only corn enough for their actual necessities, but even for a lavish supply from what had been stored up beforehand. So all hope of either storming the place or starving it into surrender was abandoned.
As it was near Rome, the nature of the ground was well known, and the Dictator was aware that the side of the city remote from his camp was weakly fortified owing to its natural strength. He determined to carry a mine through from that side to the citadel.
He formed his army into four divisions, to take turns in the fighting, and by keeping up a constant attack upon the walls in all directions, day and night, he prevented the enemy from noticing the work.