The Marble Faun, Volume I by Nathaniel Hawthorne

As the music came fresher on their ears, they danced to its cadence, extemporizing new steps and attitudes. Each varying movement had a grace which might have been worth putting into marble, for the long delight of days to come, but vanished with the movement that gave it birth, and was effaced from memory by another. In Miriam's motion, freely as she flung herself into the frolic of the hour, there was still an artful beauty; in Donatello's, there was a charm of indescribable grotesqueness hand in hand with grace; sweet, bewitching, most provocative of laughter, and yet akin to pathos, so deeply did it touch the heart. This was the ultimate peculiarity, the final touch, distinguishing between the sylvan creature and the beautiful companion at his side. Setting apart only this, Miriam resembled a Nymph, as much as Donatello did a Faun.

There were flitting moments, indeed, when she played the sylvan character as perfectly as he. Catching glimpses of her, then, you would have fancied that an oak had sundered its rough bark to let her dance freely forth, endowed with the same spirit in her human form as that which rustles in the leaves; or that she had emerged through the pebbly bottom of a fountain, a water-nymph, to play and sparkle in the sunshine, flinging a quivering light around her, and suddenly disappearing in a shower of rainbow drops.