3. M. Petreius, a centurion in Caesar's army in the Gallic war, who died fighting bravely at Gergovia, B. C. 52. (Caes. Gal. 7.50.)
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.