The Book of Wonders of Urth and Sky and other Urth tales

I know from reading a reading in a Spanish textbook once that Foila's tale, "The Armigette's Daughter," comes from a Latin American folktale called "El Pajaro de Siete Colores," or "The Bird of Seven Colours." What I would like to know is: where do the other tales told in the Urth cycle come from? The several tales of the Book of Wonders of Urth and Sky and the other tales told at the lazaret? Any help would greatly illuminate me on the folklore of Urth. Christopher R. Culver <crculver at aol.com> http://members.aol.com/crculver/index.html ------------------------------------------------