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This lesson covers three more themes that run through The Sign of Four: science and reason, wealth and greed, and the role of Victorian social conventions. These themes are closely interconnected — Holmes's rationalism reflects Victorian faith in science, while the pursuit of treasure reflects anxieties about greed and moral corruption.
Science and reason are the dominant themes of the novel. Holmes is presented as the embodiment of the rational mind — a figure who can decode the apparently inexplicable through observation, logic, and empirical method.
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