EDIT: Ser ut att båda nedan är variationer på en saga som heter Trollens dotter , inkluderad av Andrew Lang i Pink Fairy Book . Från Wikipedia sammanfattning:
Deep in the sea, he found a palace where a beautiful maiden lived.
...
Then he should offer to pay the king's debts in return for coming; once he came, he would make trouble for the troll until it demanded the king answer three questions for his life. They would be where his daughter was, and then to pick her out, and then to find the troll's heart, which was in a fish.
He went back to the troll and refused to stay in his service. He served the king and did as the troll's daughter had said. When he got to the troll's castle with the king, he broke all sorts of glass things. Then he answered the troll's questions. When he picked out his daughter, the maiden appeared and stayed by him; when he picked out the fish the maiden indicated, he cut it open and killed the troll.
Original svar:
Med fullständig kredit till Valorums svar , ser ut som en engelsk översättning kan hittas Danish Fairyales av Svend Grundtvig, översättning av J. Grant Cramer). Ebook i det offentliga området här .
Berättelsen heter guiden dotter .
...the wizard will sentence him to death in spite of the fact that he has paid his debt, unless he can answer correctly questions that my father will put to him. The first question that my father will ask, will be: 'Where is my daughter?' Then you must step forth and say, 'She is at the bottom of the sea.' He will also ask whether you can recognize her, and you must answer, 'Yes.' Then a large number of young women will be led past you in order that you may point out which one you take to be his daughter. As you might not recognize me, I shall nudge you as I pass, and you must immediately seize me and hold me fast. The wizard's next question will be, ' Where is my heart?' and you must again step forward and answer, 'It is in a fish.' He will then ask, 'Do you know this fish?' and you must again answer, 'Yes.' Then he will have all kinds of fish appear before you, and you will have to choose the right one from among them. But I will take good care to be by your side and when the right fish comes I will touch you gently, and you must seize him and quickly cut him open. Then the wizard will be discouraged and will ask you no more questions.
Det kan också vara denna version av samma historia av Chris Conover med titeln Guiden dotter: En Viking Legend. Från Goodreads recensioner:
In it an evil Wizard has taken away all the animals from the land and is pushing human-kind to starvation. There is a strong-hearted young man and a hidden princess and a test. The test is what lodged the story so firmly in my mind. The Wizard hid his heart in a fish and to save his own life the young man must find this fish. Of course he does and everyone lives happily ever after.