The Twelve Dancing Princesses. A Story By Jakob and Wilhelm Grimm. Retold by Jane Werner. Illustrated by Sheilah Beckett. Simon & Schuster; New York, 1954. First edition.
There was a king who had twelve beautiful daughters. They slept in twelve beds all in one room and when they went to bed, the doors were shut and locked up. However, every morning their shoes were found to be quite worn through as if they had been danced in all night. Nobody could find out how it happened, or where the princesses had been.