Sir Arthur Conan Doyle uses his abilities as a writer to challenge the reader to solve his mysteries. Throughout The Hound of the Baskervilles, Doyle presents clues to the reader that pose new ideas and twists on old ideas. The clues however are not always useful, creating great confusion, and stimulating the readers to dive deeper into the novel wanting to solve the crime. While Mr. Sherlock Holmes and Dr. Watson are in London many things are presented to the reader and not all pertinent to solving the crime. When Watson leaves London to travel with Sir Henry to Baskerville Hall, Doyle introduces more characters to broaden the suspect list. As a reader I was quite impressed by the way characters were introduced and how their particular traits caused the mind to analyze them more than you ever would normally. If you failed to analyze who they were, there would be a chance of missing something important, which could make or break a case.
             While Holmes and Watson were in London, the mysterious cab driver was introduced onto the scene. Holmes believed it to be someone following them and immediately attempted to identify who this mysterious person could be. At first Homes thinks it is Mr. Barrymore, the butler to the late Sir Charles Baskerville. Holmes sends a telegram to Mr. Barrymore trying to see if Barrymore is still at Baskerville Hall. Holmes' theory is foiled when he is told that Barrymore has received the message. Doyle concentrates a great deal of interest on this "mystery man", but quickly turns your attention away from him, causing you to forget about him. He isn't brought up again until late in the book, where you realize who it actually is and that your thoughts were manipulated with this strategy at the beginning. A similar strategy is followed with the hotel receipts that were collected by one of Holmes' assistants. At first the hotel receipts seem to be worthless, but at the end of the novel, w...