Many thanks to Murder by Death for pointing me to this early short story by Arthur Conan Doyle written around 1870.
Even if ACD experts don't think highly of this short ghost story, I enjoyed reading it. I was thrilled by it. And, as I read it right before bed, I was a little haunted by it.
In my book, this is a great story.
It's almost sad that people are likely to hear of it only because it was only re-discovered in 2000, not because it is a fun story and shows another side to ACD that is not connected with Sherlock Holmes.
If you're intrigued, you can find the story here.