4. COSSINIUS, a Roman knight and a friend of Nero's, was poisoned by mistake by an Egyptian physician, whom the emperor had sent for in order to cure his friend. (Plin. Nat. 29.4. s. 30.)
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.