 A number of modern researchers have recognized the importance of hallucinogenic plants in the practice of European witchcraft; among them, anthropologists Edward B. Taylor, Bernard Barnett, Michael J. Harner and Julio C. Baroja and pharmacologists Louis Lewin and Erich Hesse.Many medieval writers also comment on the use of hallucinogenic plants in witches' ointments, including Joseph Glanvill, Jordanes de Bergamo, Sieur de Beauvoys de Chauvincourt, Martin Delrio, Raphael Holinshed, Andrés Laguna, Johannes Nider, Sieur Jean de Nynald, Henry Boguet, Giovanni Porta, Nicholas Rémy, Bartolommeo Spina, Richard Verstegan, Johann Vincent and Pedro Ciruelo.Much of our knowledge of herbalism in European witchcraft comes from the Spanish Inquisitors and other authorities, who occasionally recognized the psychological nature of the "witches' flight", but more often considered the effects of witches' ointments to be demonic or satanic.