The Shadowy Waters: The Harp of Aengus by William Butler Yeats
Edain came out of Midhir's hill, and lay
Beside young Aengus in his tower of glass,
Where time is drowned in odour-laden winds
And Druid moons, and murmuring of boughs,
And sleepy boughs, and boughs where apples made
Of opal and ruhy and pale chrysolite
Awake unsleeping fires; and wove seven strings,
Sweet with all music, out of his long hair,
Because her hands had been made wild by love.
When Midhir's wife had changed her to a fly,
He made a harp with Druid apple-wood
That she among her winds might know he wept;
And from that hour he has watched over none
But faithful lovers.