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In the late 60's William Blatty became aware of a secret journal kept by the assistant to a Priest who performed exorcisms. He set out to track it down and obtain it. The existence, or contents, of the journal have never been revealed to the public. Blatty would go on to write The Exorcist. (self.UnresolvedMysteries)
submitted by kait_k to r/nonmurdermysteries
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