“Now Sleeps the Crimson Petal” by Roger Quilter, sung by Bryn Terfel.

The songs sets lines from a poem by Alfred Tennyson of the same name:

Now sleeps the crimson petal, now the white;
Nor waves the cypress in the palace walk;
Nor winks the gold fin in the porphyry font:
The fire-fly wakens: waken thou with me.

Now folds the lily all her sweetness up,
And slips into the bosom of the lake:
So fold thyself, my dearest, thou, and slip
Into my bosom and be lost in me.