The Sign of the Four

Main Characters and Their Development

• Sherlock Holmes - the main detective, possessing outstanding analytical abilities and logical thinking. In this book, he demonstrates his ability to solve complex puzzles and crimes using the deductive method. Holmes also shows his dependency on stimulants like cocaine, adding depth to his character.
• Dr. John Watson - Holmes' loyal friend and assistant, who accompanies him on investigations. Watson serves as the narrator, and through his eyes, the reader witnesses the unfolding events. In this book, he also experiences romantic feelings for Mary Morstan, adding a personal aspect to his character.
• Mary Morstan - a young woman who seeks Holmes' help in uncovering the truth about her father's fate and a mysterious inheritance. She is the object of Watson's romantic interest, and her character plays a key role in the plot's development.
• Thaddeus Sholto - the son of Major Sholto, who was a friend of Mary's father. He assists Holmes and Watson in the investigation by providing crucial information about the Agra treasure and his father.
• Jonathan Small - the main antagonist, who seeks to reclaim the Agra treasure. His story reveals the motives and circumstances that led him to crime. Small is a complex character driven by a sense of injustice and a thirst for revenge.