sentences:  It is also mentioned in the "Denham Tracts", a 19th-century collection of folklore by Michael Denham.It may have been one inspiration for the ghost dog in "The Hound of the Baskervilles" by Sir Arthur Conan Doyle, described as "an enormous coal-black hound, but not such a hound as mortal eyes have ever seen" - with fire in his eyes and breath (Hausman 1997