Grimms' fairy tales

There was once upon a time a King who had twelve daughters, each one more beautiful than the other. They all slept together in one chamber, in which their beds stood side by side, and every night when they were in them the King locked the door, and bolted it. But in the morning when he unlocked the door, he saw that their shoes were worn out with dancing, and no one could find out how that had come to pass. Then the King caused it to be proclaimed that whosoever could ...