He 'forgets' to change the colour of his ship's sails from black to white, thus wrongly signalling to his father Aegeus that he has been killed by the Minotaur.
The deuteragonist could have played the nurse, Jason, and messenger, with the tritagonist playing the tutor, Creon, and Aegeus.
Never again can I behold such men as Pirithous and Dryas shepherd of his people, or as Caeneus, Exadius, godlike Polyphemus, and Theseus son of Aegeus, peer of the immortals.
On his arrival in Athens, Theseus found his father married to the sorceress Medea, who recognized Theseus before his father did and tried to persuade Aegeus to poison him.
Such is the irrational element in the introduction of Aegeus by Euripides and the badness of Menelaus in the Orestes.
But he forgot his promise, and when Aegeus saw the black sail, he flung himself from the Acropolis and died.
