[Footnote 96: Æas.--Ver. 580. Pliny the Elder (Book iii, ch. 23) calls this river Aous. It was a small limpid stream, running through Epirus and Thessaly, and discharging itself into the Ionian sea.]
[Footnote 97: Inachus.--Ver. 583. This was a river of Argolis, now known as the Naio. It took its rise either in Lycæus or Artemisium, mountains of Arcadia. Stephens, however, thinks that Lycæus was a mountain of Argolis.]
[Footnote 98: Lerna.--Ver. 597. This was a swampy spot on the Argive territory, where the poets say that the dragon with seven heads, called Hydra, which was slain by Hercules, had made his haunt. It is not improbable that the pestilential vapors of this spot were got rid of by means of its being drained under the superintendence of Hercules, on which fact the story was founded. Some commentators, however, suppose the Lerna to have been a flowing stream.]
EXPLANATION.
The Greeks frequently embellished their mythology with narratives of Phœnician or Egyptian origin. The story of Io probably came from Egypt. Isis was one of the chief divinities of that country, and her worship naturally passed, with their colonies, into foreign countries. Greece received it when Inachus went to settle there, and in lapse of time Isis, under the name of Io, was supposed to have been his daughter, and the fable was invented which is here narrated by Ovid.
The Greek authors, Apollodorus, Strabo, Diodorus Siculus, and Pausanias, say that Io was the daughter of Inachus, the first king of Argos; that Jupiter carried her away to Crete; and that by her he had a son named Epaphus, who went to reign in Egypt, whither his mother accompanied him. They also tell us that she married Apis, or Osiris, who, after his death, was numbered among the Deities of Egypt by the name of Serapis. From them we also learn that Juno, being actuated by jealousy, on the discovery of the intrigue, put Io under the care of her uncle Argus, a man of great vigilance, but that Jupiter having slain him, placed his mistress on board of a vessel which had the figure of a cow at its head; from which circumstance arose the story of the transformation of Io. The Greek writers also state, that the Bosphorus, a part of the Ægean sea, derived its name from the passage of Io in the shape of a cow.
FABLE XIV. [I.601-688]
Jupiter, having changed Io into a cow, to conceal her from the jealousy of Juno, is obliged to give her to that Goddess, who commits her to the charge of the watchful Argus. Jupiter sends Mercury with an injunction to cast Argus into a deep sleep, and to take away his life.