P1.B.SS*The Sign of Four* (Conan Doyle) — empire, detection, Victorian anxiety; Holmes and Watson; the Agra treasure

Arthur Conan Doyle's The Sign of the Four (1890) is the second Sherlock Holmes novel, serialised in Lippincott's Monthly Magazine. For AQA Paper 1 Section B it represents the detective fiction genre and raises questions about reason vs. emotion, empire, and Victorian sensation.

Plot in brief

Mary Morstan hires Sherlock Holmes and Dr Watson after receiving mysterious pearls annually for six years and an invitation from the unknown writer. Holmes deduces, Watson narrates. The mystery leads to a stolen Indian treasure — the Agra treasure — looted during the Indian Mutiny of 1857. The villain Jonathan Small and his companion Tonga (a Andaman Islander) pursued the treasure across decades. Tonga murders Bartholomew Sholto; Small is captured on the Thames; the treasure is lost to the river. Watson proposes to Mary and is accepted.

Key themes

Reason and deduction — Holmes is a "calculating machine" who insists logic can solve any mystery. His famous deductions from Mary's watch, gloves, and appearance showcase Conan Doyle's method: observation → inference → conclusion. Holmes dismisses emotion as clouding reason ("Love is an emotional thing, and whatever is emotional is opposed to that true cold reason").

Empire and racial politics — the treasure comes from imperial India; Small's story (Ch 12) frames British India sympathetically from a white colonial perspective. Tonga is described in dehumanising terms ("little venomous devil"). The novel reflects Victorian imperial ideology: the empire generates wealth but also danger; non-white characters are threatening, exotic, or subordinate. Modern readers must engage critically with this racial framing.

Victorian sensation and horror — the blowgun, the poisoned darts, the Andaman Islander — all deploy sensation-novel techniques. Conan Doyle raises fear through the exotic and the unfamiliar.

Gender — Watson's romantic subplot (his growing love for Mary) humanises Holmes's cold world. Mary is relatively resourceful compared to many Victorian heroines, but ultimately passive.

Holmes as character

• Deduction — Holmesian method: observe everything; deduce from physical evidence; voice deductions with confidence.
• Emotional detachment — cocaine (7 per cent solution) when bored; violin at 3 am; contempt for sentiment.
• Watson as foil — Watson is emotional, admiring, occasionally inept; his narration makes Holmes seem superhuman.
• The detective as social figure — Holmes bypasses corrupt or inadequate police; represents rational civilisation.

Watson as narrator

Watson's limitations as a narrator are important: he misses clues Holmes sees; he is distracted by Mary Morstan; his narration is reliable for events but not for deduction. The retrospective narration allows him to present Holmes's genius as mysterious — even though Holmes explains afterwards.

Context (AO3)

• Victorian detective fiction — a new genre in the 1880s–90s; Conan Doyle was influenced by Poe's Dupin stories and Collins's The Moonstone.
• The Indian Mutiny 1857 — a major crisis in British India; British troops and civilians killed; reprisals brutal. The treasure backstory implicates the empire in looting and violence, though Small's account rationalises it.
• Scientific rationalism — the late Victorian era saw science vs. religion debates; Holmes represents secular, rational inquiry.
• Andaman Islands — British penal colony; Tonga's portrayal reflects racist anthropological assumptions of the period. AQA expects students to engage with this critically.

Form and structure

• Watson's first-person narration — creates suspense (Watson doesn't know); admiration for Holmes; romantic subplot.
• Small's confession (Ch 12) — retrospective explanation; gives colonial context but from a white perspective.
• The river chase — sensational climax; Gothic threat neutralised by rational detective.