6. Spiridion, or Scyridicus, a rhetorician mentioned by Quintilian (Inst. 6.1.41), and frequently by Seneca. (Fabric. Bibl. Graec. vol. ii. p. 122, vol. vi. p. 130.) [P.S]
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.