http://ignisart.com/camdenhouse/canon/houn-07.htm

http://electricliterature.com/conan-doyle-didnt-write-that-lost-sherlock-holmes-story/

http://kieranmcmullen.com/2011/08/22/the-many-watsons-edward-hardwicke/

http://movie-dude.co.uk/[Film]%20The%20Hound%20of%20the%20Baskervilles%20(1939).htm

http://horrorpedia.com/2014/01/02/the-hounds-of-the-baskervilles-holmesian-horror-in-film-and-tv/