(M323) The grand-daughter of Perseus was Alcmena, whom mythology represents as the mother of Hercules by Jupiter. The labors of Hercules are among the most interesting legends of pagan antiquity, since they are types of the endless toils of a noble soul, doomed to labor for others, and obey the commands of worthless persecutors. But the hero is finally rewarded by admission to the family of the gods, and his descendants are ultimately restored to the inheritance from which they were deprived by the wrath and jealousy of Juno. A younger branch of the Perseid family reigned in Lacedæmon—Eurystheus, to whom Hercules was subject; but he, with all his sons, lost their lives in battle, so that the Perseid family was represented only by the sons of Hercules—the Heracleids, or Heraclidæ. They endeavored to regain their possessions, and invaded the Peloponnesus, from which they had been expelled. Hyllos, the oldest son, proposed to the army of Ionians, Achæans, and Arcadians, which met them in defense, that the combat should be decided between himself and any champion of the invading army, and that, if he were victorious, the Heracleids should be restored to their sovereignty, but if defeated, should forego their claim for three generations. Hyllos was vanquished, and the Heracleids retired and resided with the Dorians. When the stipulated period had ended, they, assisted by the Dorians, gained possession of the Peloponnesus. Hence the great Dorian settlement of Argos, Sparta, and Messenia, effected by the return of the Heracleids. (M324) Another important legend is that which relates to Deucalion and the deluge, as it is supposed to shed light on the different races that colonized Greece. The wickedness of the world induced Zeus to punish it by a deluge; a terrible rain laid the whole of Greece under water, except a few mountain tops. Deucalion was saved in an ark, or chest, which he had been forewarned to construct. After floating nine days, he landed on the summit of Mount Parnassus. Issuing from his ark, he found no inhabitants, they having been destroyed by the deluge. Instructed, however, by Zeus, he and his wife, Pyrrha, threw stones over their heads, and those which he threw became men, and those thrown by his wife became women. Thus does mythology account for the new settlement of the country—a tradition doubtless derived from the remote ages through the children of Japhet, from whom the Greeks descended, and who, after many wanderings and migrations, settled in Greece.