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.
There used to be a statue of Attus, representing him with his head covered, in the Comitium, on the steps to the left of the senate-house, where the incident occurred. The whet-stone also, it is recorded, was placed there to be a memorial of the marvel for future generations.
At all events, auguries and the college of augurs were held in such honour that nothing was undertaken in peace or war without their sanction; the assembly of the curies, the assembly of the centuries, matters of the highest importance, were suspended or broken up if the omen of the birds was unfavourable.