Arthur Conan Doyle
From Jenny Everywhere Wiki
The Prime Universe's Sherlock Holmes once complained that Mr Doyle kept writing to 221B Baker Street trying to convince Holmes, Watson and Mrs Hudson to believe in “irrational third-eye poppycock”. (PROSE: The Time of the Toymaker)
Behind the scenes
Arthur Conan Doyle was, in the real world, the creator of Sherlock Holmes. Infamously, Doyle was also an ardent believer in Spiritualism and other occult phenomena, up to and including fairies. It is not unusual for later fiction involving Sherlock Holmes to posit that Doyle served as a “literary agent” of some kind for Watson's accounts of his adventures with Holmes.