Many years previously Sophocles had written his masterpiece, the _Oedipus Tyrannus_. It cannot easily be treated separately from its sequel. A mysterious plague had broken out in Thebes; Creon had been sent to Delphi by Oedipus to learn the cause of the disaster. Apollo bade the Thebans cast out the murderer of the last King Laius, who was still lurking in Theban territory. Oedipus on inquiry learns that there are several murderers, but only one of Laius' attendants escaped alive. In discovering the culprit Oedipus promises the sternest vengeance on his nearest friends, nay, on his own kin, if necessary. After a prayer from the Chorus of elders he repeats his determination even more emphatically, invoking a curse on the assassin in language of a terrible double meaning, for in every word he utters he unconsciously pronounces his own doom. With commendable foresight he had summoned the old seer Teiresias, but the seer for some reason is unwilling to appear. When at last he confronts the King, he craves permission to depart with his secret unsaid. Oedipus at once flies into a towering passion, finally accusing him without any justification of accepting bribes from Creon. With equal heat Teiresias more and more clearly indicates in every speech the real murderer, though his words are dark to him who could read the Sphinx's riddle. The Chorus break out into an ode full of uneasy surmises as to the identity of the culprit. When Creon enters, Oedipus flies at him in headlong passion accusing him of bribery, disloyalty and eventually of murder. With great dignity he clears himself, warning the King of the pains which hasty temper brings upon itself. Their quarrel brings out Jocasta, the Queen and sister of Creon, who succeeds in settling the unseemly strife. She bids Oedipus take no notice of oracles; one such had declared that Laius would be slain by his own son, who would marry her, his mother. The oracle was false, for Laius had died at the hands of robbers in a place where three roads met. Aghast at hearing this, Oedipus inquires the exact scene of the murder, the time when it was committed, the actual appearance of Laius. Jocasta supplies the details, adding that the one survivor had implored her after Oedipus became King to live as far away as possible from the city. Oedipus commands him to be sent for and tells his life story. He was the reputed son of Polybus and Merope, rulers of Corinth. One day at a wine-party a man insinuated that he was not really the son of the royal pair. Stung by the taunt he went to Delphi, where he was warned that he should kill his father and marry his mother. He therefore fled away from Corinth towards Thebes. On the road he was insulted by an old man in a chariot who thrust him rudely from his path; in anger he smote the man at the place where three ways met. If then this man was Laius, he had imprecated a curse on himself; his one hope is the solitary survivor whom he had sent for;