"This is bringing the Matter into a narrow Compass, and putting an end to Cavil and Quarrel about it; there is no need to wrangle upon it any more; but when you at any time see an Apparition, or Appearance of Spirit assuming Shape and Voice, and you are sure it is really an Apparition, not a Deceptio Visus, a Cloud, a Vapour of the Imagination; I say, whenever you see such an Apparition, depend upon it; 'tis an Angel, or a Devil."
— Defoe, Daniel (1660?-1731)
Text from An Essay on the History and Reality of Apparitions: Being an Account of What They are, and What They are Not; Whence They Come, and Whence They Come Not. (London: Printed: and sold by J. Roberts, 1727). <Link to ECCO-TCP>