Sir Arthur Conan Doyle’s famous detective Sherlock Holmes is a major character in the book “The Sign of Four.” The qualities of a detective hero are best exemplified by Sherlock Holmes, who possesses amazing deductive reasoning, keen observational abilities, and unwavering resolve.

The Brilliant Mind of Sherlock Holmes

Sherlock Holmes is unique among regular people because of his exceptional intelligence. His exceptional reasoning skills enable him to solve challenging puzzles. As he says, “From long habit, the train of thoughts ran through my mind so swiftly that I arrived at the conclusion without being conscious of intermediate steps” (Doyle, 21).