The first one might be Two Sisters - put #10 into the blue search box for a lot of versions. Two sisters are courted by the same man. One sister drownds the other. The miller may or may not pull her out of the mill pond, steal her rings and push her back in and traveling minstrels may find her and make a harp or fiddle out of her breastbone, pegs out out of her "long finger bones" and strings out of her hair. The harp or fiddle plays alone and accuses the guilty sister who gets hung or burned, often next to the miller. Or it might be a different song entirely...