Cross-posted from Dafydd's Random Music.
Child Ballad 10: The Cruel Sisters, also known as The Twa Sisters. Evidently in addition to strange knights, you can't trust your sister either. Then there's the minstrel. If I find a dead body on the seashore, I'm not making a harp out of the bones. I guess I'll never be in a ballad. Sung by Pentangle.