Poseidon (Neptune) and Apollo, whom Jupiter had condemned to serve King
Laomedon of Troas for a year. The stones were charmed into their places
by the breathing of Apollo's flute, as the walls of Thebes are said to
have risen to the strain of Amphion's lyre. Compare _Tithonus_, 62-63:

"Like that strange song I heard Apollo sing,
When Ilion, like a mist, rose into towers."

And cf. also _The Princess_, iii. 326.

42-43. THAT--WOE. Compare _In Memoriam_, V.

50. WHITE HOOVED. Cf. "hooves" for hoofs, in the _Lady of Shalott_, l.
101.

51. SIMOIS. One of the many streams flowing from Mount Ida.

65. HESPERIAN GOLD. The fruit was in colour like the golden apples in
the garden of the Hesperides. The Hesperides were three (or four)
nymphs, the daughters of Hesperus. They dwelt in the remotest west, near
Mount Atlas in Africa, and were appointed to guard the golden apples
which Herè gave to Zeus on the day of their marriage. One of Hercules'
twelve labours was to procure some of these apples. See the articles
_Hesperides_ and _Hercules_ in Lempriere.

66. SMELT AMBROSIALLY. Ambrosia was the food of the gods. Their drink
was nectar. The food was sweeter than honey, and of most fragrant odour.

72. WHATEVER OREAD. A classical construction. The Oreads were mountain
nymphs.