Assipattle and the Stoor Worm

Unless a solution could be found the Princess would have to be sacrificed to the monster serpent.

Assipattle and the Stoor Worm is an Orcadian folktale relating the battle between the eponymous hero and a gigantic sea serpent known as the stoor worm. The tale was preserved by 19th-century antiquarian Walter Traill Dennison, and retold by another Orcadian folklorist, Ernest Marwick, in a 20th-century version that integrates Dennison's texts with tidbits from other oral storytellers.