History and Philosophy of Spirits, Demons and Apparitions

The great number of authors who have written upon the apparitions of angels, demons, and disembodied souls is not unknown to me; and I do not presume sufficiently on my own capacity to believe that I shall succeed better in it than they have done, and that I shall enhance their knowledge and their discoveries. I am perfectly sensible that I expose myself to criticism, and perhaps to the mockery of...