Sherlock Holmes described himself as a "consulting detective", an expert who is brought into cases that have proven too difficult for other (typically official) investigators; we are told that he is on many an occasion able to solve a problem without leaving his home. Naturally, this aspect is minimized in the stories themselves, which tend to focus on the more interesting cases that require him to do actual legwork. He specializes in solving unusual cases using his extraordinary powers of observation and logical reasoning, and frequently demonstrates these abilities to new clients by making on-the-spot deductions about their personalities and recent activities. This simple marketing strategy rarely fails to impress and build confidence in his services.


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