13. Cn. Calpurnius Piso, of whom we know nothing, except that he was consul B. C. 139, with M. Popillius Laenas. (V. Max. 1.3 § 2.)
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.