The story just really does not hold together well. It's too brief. Watson's voice, which I find so important to appreciating Holmes pastiche, was really off. Holmes does not show his customary skepticism and outright scoffing at paranormal happenings. In fact, he's rather devoid of much personality at all in this story. Everything feels very flat.
It's a pity because I think if the author invested more time in this story, he could turn it into a good one.