A way these chapters vary from what we’ve seen so far in Sherlock Holmes stories is that they’ve put Watson on his own, and therefore having to make his own deductions and draw his own conclusions. What we’ve seen previously has been either both Sherlock Holmes and Doctor Watson experiencing an adventure/case together, or just Sherlock Holmes recounting to Watson a previous adventure/case he had had. By doing this, Sir Arthur Conan Doyle has further separated us from what is going in Holmes’ mind: like Watson, we’re left to having to make our own deductions and then draw our own conclusions from those. Thus it helps us to better be in the mind of the narrator- Watson- and experience the ongoing events from his perspective and viewpoint. Then when Sherlock Holmes reappears, this narrative strategy remarkably adds to how Holmes’ correct deductions impact us- we were kept in the dark, and have thought up to this point that Holmes was back at 221B Baker Street, only to find out that he was, in fact, right here under everyone’s noses. I remember when I first read this story, I had absolutely no clue the mystery man was going to turn out to be Holmes. Now when I read it a second time, kenning throughout the entire part of the book up to this point that Holmes was actually there this whole time (along with all of the other spoilers information), everything makes a lot more sense, and early on I could understand what had really just gone on in each part of the story.