 In key scenes, the third line replaces the repeated second line to speed up the action.According to the Aarne-Thompson system of classifying folktale plots, the tale of Halewijn is type 311 (the heroine rescues herself from a supernatural foe).Similar tales are "Fitcher's Bird", "The Old Dame and Her Hen", and "How the Devil Married Three Sisters" and the tale shares more than a likeness with the various versions of "Lady Isabel and the Elf Knight", Child ballad 4.