Blatty refers to the Loudun possessions and the Louviers possessions throughout the story, mostly when Fr. Karras is researching possession and exorcism to present the case to his superiors.Pages 245–250 in the 40th Anniversary edition. He also has one of his characters tell a brief story about an unnamed fraudulent medium who had studied to be a Jesuit priest. This story can be found in Proceedings of the Society for Psychical Research, Vol. 114. 1930, in an article about fraudulent practices by Daniel Dunglas Home.Count Petrovsky-Petrovo-Solovo. "Some Thoughts on D.D. Home". In Proceedings of the Society for Psychical Research, Vol. 114. 1930. Quoted in John Casey (2009), After Lives: A Guide to Heaven, Hell and Purgatory. Oxford. pp. 373–374.
Blatty refers to the Loudun possessions and the Louviers possessions throughout the story, mostly when Fr. K?arras is researching possession and exorcism to present the case to his superiors.Pages 245–250 in the 40th Anniversary edition. He also has one ,of his characters tell a brief story about an unnamed fraudulent medium who had studied to be :a Jesuit priest. This story can be found in Proceedings of the Society for Psychical Research, Vol. 114. 1930, in an article about fraudulent practices by Daniel Dunglas Home.Count Petrovsky-Petrovo-Solovo. "Some Thoughts on D.D. Home". In Proceedings of the Society for Psychical Research, Vol. 114. 1930. Quoted in John Casey (2009), After Lives: A Guide to Heaven, Hell and Purgatory. Oxford. pp. 373–374.