The worldwide stories of faerie changelings come under a group of motifs recorded in the Aarne-Thompson folklore index as F321: ‘Faerie steals child from cradle and leaves faerie substitute.’ The basic premise of these motifs is that the faeries, through supernatural means, are capable of abducting babies from humans, whilst replacing them with one of their own, usually a wizened old faerie who would proceed to eat and drink voraciously, and maintain a surly silence. With external advice, the parents are usually advised of how to rid themselves of the changeling and restore their own baby from the faeries. The ruse is carried through and (usually) works.
19th-century image of a faerie changeling baby. (Courtesy author)
There are many variations on the story, but the Brothers Grimm summed up in concise form the main components of a typical changeling story from mid-19th-century Germany:
A mother had her child taken from the cradle by elves. In its place they laid a changeling with a thick head and staring eyes who would do nothing but eat and drink. In distress she went to a neighbor and asked for advice. The neighbor told her to carry the changeling into the kitchen, set it on the hearth, make a fire, and boil water in two eggshells. That should make the changeling laugh, and if he laughs it will be all over with him. The woman did everything just as her neighbor said. When she placed the eggshells filled with water over the fire, the changeling said:
‘Now I am as old
As the Wester Wood,
But have never seen anyone cooking in shells!’
And he began laughing about it. When he laughed, a band of little elves suddenly appeared. They brought the rightful child, set it on the hearth, and took the changeling away.