Another investigator of ghosts was philosopher and bookseller, Friedrich Nicolai. His interest in the paranormal began after he suffered from visions of deceased people. He began to investigate and try to find a cure for the condition. In 1799, he presented “Memoir on the Appearance of Spectres or Phantoms Occasioned by Disease” the book not only included various experiences with the paranormal but also the view that it could be cured by the application of leeches.
It took nearly a hundred years for the paranormal to have a real investigation group. Originally called the Ghost Society, the Society for Psychical Research was established in 1882 to examine alleged paranormal phenomena. The society was founded by a distinguished group of scholars and continues to investigate the paranormal in a scientific and unbiased way.P/S: The author of “Discoverie of Witchcraft” in 1589 claimed fairies, demons and witches were real but didn’t believe in ghosts.