[XI.] Ida was the mountain in the Troad whence the wood for the fleet was taken. Berecyntia. Cybele, the mother of the gods. Originally a Phrygian goddess, the centre of whose worship was Mount Berecyntus.
[XIV.] The 'brother' is Pluto, god of the lower world. 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.