To swear by the Styx was the most dread and binding oath; it was inviolable even by the gods.
XVIII.

The reference here is to the story of how Paris, son of Priam, king of Troy, seized Helen, the wife of Menelaus, king of Sparta, and so caused the Trojan war.

Menelaus and Agamemnon were the sons of Atreus.
XXVIII.

For Acestes see note on Book V.stanza vi.
XXXIII.

Assaracus was an ancestor of the Trojan race, and his household gods would of course be the tutelary spirits of the Trojan royal family.
LII._Latonia_.The daughter of Leto, and sister of Apollo, Diana, who was identified with the Greek Artemis, the goddess of the woods and of hunting.
LXXII.