Finishing off the year with a couple of plays penned by Sir Arthur Conan Doyle, based on two of his short stories. This one is based on The Adventure of the Mazarin Stone, and was performed in 1921, the same year as publication. It's one of his later and less highly regarded stories and the stage version takes the key elements of the story and simplifies the narrative, with the villain being Colonel Sebastian Moran, Moriarty's henchman from The Empty House. Works quite well as a simple, one act play. ( )