Arthur Conan Doyle

In some universes, such as the one where Aziraphale resided, Arthur Conan Doyle was the writer who invented Sherlock Holmes. Among his works featuring the character was A Study in Scarlet. (PROSE: You've Been To Eden, I Perceive)

In the Prime Universe, where Sherlock Holmes was a real being, 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.