Probably the best-known of all of Sherlock Holme's adventures, it's the tale of an old legend which begins to have deadly consequences for inheritors of an estate. Not very original, and probably not even so 100 years ago, whenn it was written. But of course, there is no dark magic, only a master criminal at work. Even this has been done to death since, most notably by Messrs Hanna and Barbarra, creators of Scooby Doo.
I'm glad Sir Arthur resisted the urge to bring in a younger, (supposedly) hipper assistant unlike Messrs Hanna and Barbarra. The exciting adventures of Scraplock Holmes never made it to press.
But it's always good to check in with the world's most popular detective. he's not as clever as the myth surrounding him suggests. But maybe he is more cautious in his later stories. In some of the early ones, he can tell all sorts of things from a coupld of scratches on a piece of wood. Things modern forensics would have trouble telling you.
Sherlock also lays off the drugs for the duration of this story. Something Scooby Doo could never manage.