I finally worked out that tricksy last line! So, here's one from someone other than HI!
I can't quite remember how the original goes, and don't have my book handy, but it's Galadriel's song in Lothlorien, beginning with
I sang of leaves, of leaves of gold, and leaves of gold there grew.
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You spoke of roots, of silver roots, but silver roots dissolved,
You spoke of calm, but no calm came into the hearts you loved.
Before the earth, before the sea, the moon shone on the land,
And silver stones of Ilmarin sat silent in your hand.
Here short the silver roots have gone behind the long straight days,
While there before the joining streams the joy of mortals stays.
O Moria, the summer comes, the brightly starlit night,
The trees are blooming in the spring, the blossoms fair and white.
O Moria, how short my stay within that far-off wood,
I would not wish to go again, not even if I could.
And if of wings you now should speak, these wings of mine would fly,
Far away, so far away, through starlit summer skies.
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