About this time Menetheus, the son of Peteus, grandson of Orneus, and great-grandson to Erechtheus, the first man that is recorded to have affected popularity and ingratiated himself with the multitude, stirred up and exasperated the most eminent men of the city, who had long borne a secret grudge to Theseus, conceiving that he had robbed them of their several little kingdoms and lordships, and, having pent them all up in one city, was using them as his subjects and slaves. He put also the meaner people into commotion, telling them, that, deluded with a mere dream of liberty, though indeed they were deprived both of that and their proper homes and religious usages, instead of many good and gracious kings of their own, they had given themselves up to be lorded over by a newcomer and a stranger. Whilst he was thus busied in infecting the minds of the citizens, the war that Castor and Pollux brought against Athens came very opportunity to farther the sedition he had been promoting, and some say that he by his persuasions was wholly the cause of their invading the city. At their first approach they committed no acts of hostility, but peaceably demanded their sister Helen; but the Athenians returning answer that they neither had her nor knew where she was disposed of, they prepared to assault the city, when Academus, having, by whatever means, found it out, disclosed to them that she was secretly kept at Aphidnea. For which reason he was both highly honored during his life by Castor and Pollux, and the Lacedaemonians, when often in after times they made excursions into Attica, and destroyed all the country round about, spared the Academy for the sake of Academus.
Hercules, passing by the Molossians, was entertained in his way by Aidoneus the king, who, in conversation, accidentally spoke of the journey of Theseus and Pirithous into his country, of what they had designed to do, and what they were forced to suffer. Hercules was much grieved for the inglorious death of the one and the miserable condition of the other. As for Pirithous, he thought it useless to complain; but begged to have Theseus released for his sake, and obtained that favor from the king. Theseus, being thus set at liberty, returned to Athens, where his friends were not wholly suppressed, and dedicated to Hercules all the sacred places which the city had set apart for himself, changing their names from Thesea to Herculea, four only excepted, as Philochorus writes. And wishing immediately to resume the first place in the commonwealth, and manage the state as before, he soon found himself involved in factions and troubles; those who long had hated him had now added to their hatred contempt; and the minds of the people were so generally corrupted, that, instead of obeying commands with silence, they expected to be flattered into their duty. He had some thoughts to have reduced them by force, but was overpowered by demagogues and factions. And at last, despairing of any good success of his affairs in Athens, he sent away his children privately to Euboea, commending them to the care of Elephenor, the son of Chalcodon; and he himself, having solemnly cursed the people of Athens in the village of Gargettus, in which there yet remains the place called Araterion, or the place of cursing, sailed to Scyros, where he had lands left him by his father, and friendship, as he thought, with those of the island.
Lycomedes was then king of Scyros. Theseus, therefore, addressed himself to him, and desired to have his lands put into his possession, as designing to settle and dwell there, though others say that he came to beg his assistance against the Athenians. But Lycomedes, either jealous of the glory of so great a man, or to gratify Menestheus, having led him up to the highest cliff of the island, on pretense of showing him from thence the lands that he desired, threw him headlong down from the rock and killed him.