（*(/Orkios), the god who watches over oaths, or is invoked in oaths, and punishes their violation, occurs chiefly as a surname of Zeus, under which the god had a statue at Olympia. (Paus. 5.24.2; Eur. Hipp. 1025.) [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.