
You are Dr. Watson, watching Holmes puzzle over a cipher smuggled out of Professor Moriarty's organization by an informant called Porlock. An almanac unlocks three words, Douglas, Birlstone, danger, minutes before Inspector MacDonald arrives to report that John Douglas of Birlstone Manor was shot dead inside a locked house behind a raised drawbridge. A card marked V.V. and 341 lay beside the body; his wedding ring is missing, though another remains above it. You board the train for Birlstone with Holmes, already doubting whose body it is.
Read The Valley of Fear