The Legend goes that Julie was a Saxon princess at the time of the Viking invasion. She and the rest of the Royal Family watched the longboats row up the estuary and the hordes of warriors run up the beach where they were met by the valiant defenders who were all savagely and swiftly slaughtered.
The Vikings captured Princess Julie and her parents and younger sister and imprisoned them; the three women suffered terrible indignities at the hands of the uncouth invaders but the brave Princess Julie hatched a plan to save the lives of her family. She dropped her robe and stood naked before the Viking chieftain and his inner circle. As they stared transfixed by the beauties of her lithe, young body Julie said that she would willingly pleasure the Vikings if they let her family live unmolested. She swayed and showed off her charms and promised that her unmarked white body would give them undreamed of pleasures of the sort which they could never know if they simply took her by force as if she were a common peasant.
Of course the lusts of the Vikings made their decision for them and they agreed to her terms. Her horrified family had witnessed her parley with the invaders and they were led away in chains to guarantee that the young princess kept her word.
And so every morning the King and Queen and the young princess who was Julie's younger sister were led out in their chains so that Julie could see that they were alive and unmarked. After this demonstration she would have to keep her word and satisfy any of the Vikings who came to her.