§ Of the Coming of Men into the West The Silmarillion

Long Felagund watched them, and love for them stirred in his heart; but he remained hidden in the trees until they had all fallen asleep. Then he went among the sleeping people, and sat beside their dying fire where none kept watch; and he took up a rude harp which Bëor had laid aside, and he played music upon it such as the ears of Men had not heard; for they had as yet no teachers in the art, save only the Dark Elves in the wild lands.