 Of Cornelius Agrippa and Johann Weyer, author of "De Præstigiis Demonum" (Basle, 1566), whose views he adopted, he spoke with respect.Scot did adopt contemporary superstition in his references to medicine and astrology.He believed in the medicinal value of the unicorn's horn, and thought that precious stones owed their origin to the influence of the heavenly bodies.