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.
In[*](War with the Latins.) this state of affairs, the Latins, with whom a treaty had been made in the reign of Tullus, recovered their confidence, and made an incursion into Roman territory. On the Romans seeking redress, they gave a haughty refusal, thinking that the king of Rome was going to pass his reign amongst chapels and altars, In the temperament of Ancus there was a touch of Romulus as well as Numa.
He realised that the great necessity of Numa's reign was peace, especially amongst a young and aggressive nation, but he saw, too, that it would be difficult for him to preserve the peace which had fallen to his lot unimpaired. His patience was being put to the proof, and not only put to the proof but despised; the times demanded a Tullus rather than a Numa. Numa had instituted religious observances for times of peace, he would hand down the ceremonies appropriate to a state of war.
In order, therefore, that wars might be not only conducted but also proclaimed with some formality, he wrote down the law, as taken from the ancient nation of the Aequicoli, under which the Fetials act down to this day when seeking redress for injuries. The procedure is as follows: —