In Conan Doyle's era, the three great detectives were Sherlock Holmes, Robin, and Conan Doyle himself. Sherlock Holmes was the most famous detective, famous for his wit, calmness, and reasoning ability. Robin was another important detective character. His image was very vague in the novel, but some readers had a deep impression of him. Conan Doyle created detective characters in his own way and was considered one of the three great detective novelists.