Character Analysis
Sherlock Holmes: The Flawed Genius
Holmes is not a conventional hero. He is brilliant, arrogant, emotionally detached, and addicted to cocaine. Doyle presents him as a man whose extraordinary intellect is both his greatest strength and his deepest flaw. When he has a case, Holmes is electric: focused, energetic, capable of astonishing deductions. Without a case, he collapses into boredom and self-destruction. His opening line about his mind rebelling “at stagnation” defines his entire character arc.
Holmes’s deductive method is his defining quality. He reads Watson’s watch like a scientist reads data. At Pondicherry Lodge, he measures footprints, identifies creosote, and reconstructs the crime while Jones blunders. His famous maxim — “eliminate the impossible” — encapsulates the Victorian ideal of rational inquiry. Yet his rationality has limits: he cannot sustain emotional relationships, he dismisses Watson’s romantic feelings, and he returns to cocaine the moment the intellectual challenge ends.
Holmes is characterised by three tensions: intellectual brilliance (“eliminate the impossible”), emotional detachment (he dismisses Watson’s engagement with the cocaine syringe), and self-destructive restlessness (“my mind rebels at stagnation”). For the exam, always analyse Holmes through these contrasts rather than treating him as simply ‘clever.’
Dr John Watson: Narrator and Moral Centre
Watson is far more than Holmes’s sidekick. As the first-person narrator, he controls everything the reader sees. He is honest, warm, brave, and morally grounded — qualities that contrast with Holmes’s cold brilliance. Watson served in Afghanistan and was wounded by a Jezail bullet — in Chapter 1 he sits “nursing my wounded leg”; he embodies Victorian ideals of duty, honour and masculine stoicism.
Watson’s role as narrator is crucial for the mystery genre. Because Watson is intelligent but not as brilliant as Holmes, the reader discovers clues at Watson’s pace — always one step behind Holmes. This creates suspense. Watson’s romantic subplot with Mary Morstan adds emotional depth. His awareness that the treasure would make Mary rich and therefore ‘above’ him reveals the class anxieties of Victorian courtship. When the treasure is lost, Watson is relieved rather than disappointed — he values love over wealth.
Mary Morstan challenges some Victorian gender expectations while conforming to others. She is brave: she comes to Baker Street alone, accompanies the men into danger at Pondicherry Lodge, and does not faint or become hysterical at the sight of Bartholomew’s body. Watson describes her expression as “sweet and amiable,” and on the night journey her face is “composed, but pale” while “her self-control was perfect” — Doyle gives her both warmth and determination.
However, Mary is also defined by her relationship to men. Her story begins with her father’s disappearance and ends with Watson’s proposal. She is a governess — respectable but dependent. The treasure would have given her independence, but its loss is presented as a blessing because it allows Watson to propose. Doyle does not question whether Mary might have wanted the independence that wealth would bring. For the exam, you can analyse Mary as both stronger than the typical Victorian heroine and still constrained by the era’s gender norms.
Jonathan Small: Villain or Victim?
Jonathan Small is the novel’s most complex character. He is both the antagonist — responsible for Bartholomew’s murder and the chase — and a sympathetic villain. His confession in Chapter 12 reveals a man shaped by empire: he lost his leg serving in India, was drawn into the treasure plot by circumstance, and was then betrayed by Major Sholto. He has a genuine grievance.
However, Small is not innocent. He participated in the murder of the merchant without apparent remorse, and he brought Tonga to London knowing Tonga would kill. His throwing of the treasure into the Thames is an act of spite as much as principle. Doyle complicates the reader’s response: you can sympathise with Small’s sense of injustice while recognising his violence. This moral ambiguity is excellent exam material — it shows Doyle questioning simple categories of ‘hero’ and ‘villain.’
Small is both villain and victim. Villain: he murdered the merchant, he brought Tonga to kill Bartholomew, he destroyed the treasure out of spite. Victim: he lost his leg in imperial service, he was betrayed by Sholto, he spent decades imprisoned. Doyle deliberately complicates moral judgment — the exam rewards students who explore this ambiguity.
Tonga: The Silenced Character
Tonga is the novel’s most troubling figure. He is an Andaman Islander whom Small befriended in prison, and he is fiercely loyal — Small calls him “staunch and true.” Yet Doyle never gives Tonga a voice. He does not speak a single line of dialogue. He is described using dehumanising language drawn from colonial gazetteers: “savage,” “unhallowed dwarf,” “naturally hideous.” He kills Bartholomew with a blowpipe dart and is himself killed without mourning. In the exam, Tonga is essential for AO3: his treatment reveals the racial prejudice embedded in Victorian literature and colonial attitudes.
Thaddeus Sholto is one of Doyle’s most vivid comic creations. He is anxious, theatrical, a hypochondriac, and surrounded by expensive Eastern art. His nervousness provides comic contrast to the growing danger of the plot. Yet he also has a conscience: he has been sending Mary the pearls out of guilt for his father’s theft. Thaddeus represents the possibility of moral redemption within a corrupt family. His wrongful arrest by Jones adds dramatic irony — the most morally honest of the Sholtos is the one punished.
Thaddeus also functions as a foil to his twin brother Bartholomew. While Bartholomew hoards the treasure, Thaddeus wants to share it. Their different responses to inherited wealth show that individuals can choose differently even within the same circumstances.
In the exam, you will score highly by showing how characters function in relation to each other. Holmes and Watson are complementary opposites. Small and Sholto mirror each other as men corrupted by the treasure. Mary and Holmes represent emotion versus intellect. Tonga and the Irregulars are both marginalised figures used by more powerful characters. Character analysis in The Sign of Four is always about relationships, not individuals in isolation.