Be good to see more of this sort of stuff, I find it really interesting. Arthur Conan Doyle was obsessed with spiritualism throughout much of his life which is pretty evident in numerous interviews and write ups. He thought it much more intriguing than any of the fictional cases Holmes ever investigated. Conan Doyle did some investigation at a haunted pub in Watford Village (near where the Watford Gap is now) in the early 1890s , the Henley Arms. Apparently the landlord, a chap called Alfred Newton let him hold a seance there to try and find out why the spirit of a long dead serving maid was haunting the place. Then he went on to investigate some hauntings in Devon, and at other places. He also did his own investigations into the Wyrley Horse Mutilations (these days livestock mutilations are big Forteana in the USA, but we had them in the UK first!) and was able to exonerate George Edalji, destroying the case against him.