"[Pedro de Valencia] attempted to view the witches’ sabbat in the contexts of the history of religions, pharmacology and theology. [He] ended up with a compromise […] that the sabbat was an illusion produced either by the witches’ ointments or by the Devil, but that in either case it was a dream phenomenon. The long discourse to the Inquisitor General ended with the recommendation that in every concrete witch case one was to search for a palpable corpus delicti in order to ensure that no person was sentenced for actions or injuries which had never been committed or which could be explained as natural occurrences or accidental misfortunes."

— Gustav Henningsen, The Salazar Documents: Inquisitor Alonso de Salazar Frías and Others on the Basque Witch Persecution (2004)

