Summary: Sherlock learns that Stapleton is actually a Baskerville, which is the last information he needed. He brings in Lestrade and sets a trap. They make Stapleton and Henry think they’ve left town and send Henry to have dinner at Stapleton’s alone. Sherlock and company hide outside and wait, with guns drawn for Henry to start his lonely walk home. He stays so long, though, that fog rolls in, which could ruin the plan and doom Henry. They have to move positions, and when Henry does start home and Stapleton releases his dog (which is huge and glows in the dark) it almost gets Henry before Sherlock can fill it full of lead. Stapleton makes a run for it, but Mrs. Stapleton tells them where he went–to the cave in the bog. Later, they investigate the area but see no sign of him ever reaching the cave, so he must have been sucked down into the mud and killed. Weeks later, Watson asks Sherlock to explain everything, and we hear about Stapleton’s past and how he committed his murders.
Sherlock Rating: This section: 5 pawprints; This book: 5 magnifying glasses. This was a well done mystery. It had action, suspense, and a real bad guy who didn’t get away. All the requirements met.
Mystery Story Convention: Scooby Doo trap. I wrote a blog post a while back about how if you explain your plan/trap, it had better go wrong. This plan does, of course, and Sherlock has to improvise. Luckily, it all works out in the end.