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.

She then disclosed the fact that the State was suffering through the crimes of certain women; those poisons were concocted by Roman matrons, and if they would follow her at once she promised that they should catch the poisoners in the act.

They followed their informant and actually found some women compounding poisonous drugs and some poisons already made up.