6. P. Annius, tribune of the soldiers, was the murderer of M. Antonius, the orator, in B. C. 87, and brought his head to Marius. (V. Max. 9.2.2; Appian, App. BC 1.72.)
William Smith. A Dictionary of Greek and Roman biography and mythology. London. John Murray: printed by Spottiswoode and Co., New-Street Square and Parliament Street. In the article on Soranus, we find: "at this present time (1848)" and this date seems to reflect the dates of works cited. 1873 - probably the printing date.