praefectus praetorio in the reign of Valerian (A. D. 253-260), who addressed Ablavius a letter respecting Claudius, afterwards emperor. (Trebell. Poll. Claud. 15.)
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.