East O' the Sun and West O' the Moon

"[...]sorrowful and would neither eat nor drink. One day the White Bear came to her and said: "Lassie, why are you so sorrowful? This castle and all that is in it are yours, the silver bell will give you anything that you wish. I only beg one thing of you—ask no questions, trust me and nothing shall harm you. So now be happy again." But still the lassie had no peace of mind, for one thing she wished to know: Who it was who came in the night and slept in her room? All day long and all night long she wondered and longed to know, and she fretted and pined away. [...]".