（Θυέστης), a son of Pelops and Hippodameia, was the brother of Atreus and the father of Aegisthus. (Horn. Il. 2.107; Aeschyl. Agam. 1242 ; Eurip. Or. 1008 ; comp. ATREUS ; PELOPS; AGAMEMNON.) [L.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.