When the Athenians had made all necessary preparations to repel the invaders, an oracle announced that the
sacrifice of a maiden of noble birth was necessary to ensure to them victory; whereupon Macaria, the beautiful daughter of Heracles and Deianira, magnanimously offered herself as a sacrifice, and, surrounded by the noblest matrons and maidens of Athens, voluntarily devoted herself to death.
While these events were transpiring in Athens, Hyllus, the eldest son of Heracles and Deianira, had advanced with a large army to the assistance of his brothers, and having sent a messenger to the king announcing his arrival, Demophoon, with his army, joined his forces.
In the thick of the battle which ensued, Iolaus, following a sudden impulse, borrowed the chariot of Hyllus, and earnestly entreated Zeus and Hebe to restore to him, for this one day only, the vigour and strength of his youth. His prayer was heard. A thick cloud descended from heaven and enveloped the chariot, and when it disappeared, Iolaus, in the full plenitude of manly vigour, stood revealed before the astonished gaze of the combatants. He then led on his valiant band of warriors, and soon the enemy was in headlong flight; and Eurystheus, who was taken prisoner, was put to death by the command of king Demophoon.
After gratefully acknowledging the timely aid of the Athenians, Hyllus, accompanied by the faithful Iolaus and his brothers, took leave of king Demophoon, and proceeded to invade the Peloponnesus, which they regarded as their lawful patrimony; for, according to the will of Zeus, it should have been the rightful possession of their father, the great hero Heracles, had not Hera maliciously defeated his plans by causing his cousin Eurystheus to precede him into the world.
For the space of twelve months the Heraclidæ contrived to maintain themselves in the Peloponnesus; but at the expiration of that time a pestilence broke out, which spread over the entire peninsula, and compelled the Heraclidæ to evacuate the country and return to Attica, where for a time they settled.
After the lapse of three years Hyllus resolved on
making another effort to obtain his paternal inheritance. Before setting out on the expedition, however, he consulted the oracle of Delphi, and the response was, that he must wait for the third fruit before the enterprise would prove successful. Interpreting this ambiguous reply to signify the third summer, Hyllus controlled his impatience for three years, when, having collected a powerful army, he once more entered the Peloponnesus.
At the isthmus of Corinth he was opposed by Atreus, the son of Pelops, who at the death of Eurystheus had inherited the kingdom. In order to save bloodshed, Hyllus offered to decide his claims by single combat, the conditions being, that if he were victorious, he and his brothers should obtain undisputed possession of their rights; but if defeated, the Heraclidæ were to desist for fifty years from attempting to press their claim.
The challenge was accepted by Echemon, king of Tegea, and Hyllus lost his life in the encounter, whereupon the sons of Heracles, in virtue of their agreement, abandoned the Peloponnesus and retired to Marathon.