All that's left to do is to catch the murderer firmly. Holmes had already concluded in his mind that the person who walked into the house with Driber was none other than the driver of the carriage. Because Holmes could tell from some traces on the street that the horse pulling the carriage had acted casually, which would not have been possible if someone had been driving it. If the driver was not in this house, where could he go? It is also ridiculous to think that any sane person would commit a calculated crime in the presence of a third party who would surely reveal his secret. Finally, if a person wants to follow another person around London, is there any other better way than being a coachman? After considering these questions, Holmes came to the inevitable conclusion that Jefferson Hope must be found among the hackney cab drivers in the capital.

If he had been a coachman, there is no reason to believe that he would have quit. On the contrary, from his perspective, a sudden change of work would be more likely to draw the attention of his servants to him. He will continue to work in his industry for at least a period of time. It makes no sense to think that he is now using a pseudonym; why would he change his name in a country where no one knows his real name? So, I formed a reconnaissance company of some street wanderers and sent them step by step to every carriage factory in London to inquire until they found the person I, Holmes, was looking for. In the murder of Stangerson, Holmes found two pills. And Holmes had already guessed that there must be such a thing.

Actually, I personally feel that the reason is far-fetched. But this is such an old detective novel after all. It is really difficult to make everything reasonable. In fact, it seems that the reason is far-fetched and is a common problem in many detective novels. .