A faery loved a little child who used to cut turf at the side of a faery hill. Every day the faery put out his hand from the hill with an enchanted knife. The child used to cut the turf with the knife. It did not take long, the knife being charmed. Her brothers wondered why she was done so quickly. At last they resolved to watch, and find out who helped her. They saw the small hand come out of the earth, and the little child take from it the knife. When the turf was all cut, they saw her make three taps on the ground with the handle. The small hand came out of the hill. Snatching the knife from the child, they cut the hand off with a blow. The faery was never again seen. He drew his bleeding arm into the earth, thinking, as it is recorded, he had lost his hand through the treachery of the child.
W. B. Yeats, The Celtic Twilight