Addendum to the last post

I forgot to list my sources:

The story is credited to a shepherd, Matoche, who related it to Felix Arnaudin in 1875. The berger lived in La Sérre de las Prades, which is now called Solférino.

The book from which I translated the story was Contes des Landes de Gascogne: Les Fées de la dune. Ed. Felix Arnaudin. L'école des loisirs. Paris, 2001.