Jean de Nynauld was a French physician who wrote an important work on lycanthropy in 1615 titled De la lycanthropie, transformation et extase des sorciers (On lycanthropy, transformation and ecstasy of witches). de Nynauld saw lycanthropy as a form of mental illness rather than a form of magic.
↑Robbins, Rossell Hope. (1959) The Encyclopedia of Witchcraft and Demonology. London: Peter Nevill, p. 326.
↑Davidson, Jane P. (2012) Early modern supernatural: The dark side of European culture, 1400–1700. Santa Barbara: ABC-CLIO, p. 160. ISBN978-0-313-39344-0