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The Sign of the Four · Chapter

The Tragedy of Pondicherry Lodge explained

Holmes, Watson, and Miss Morstan accompany Thaddeus Sholto to Pondicherry Lodge, where they discover his twin brother Bartholomew dead in a locked room, with a poisoned thorn in his neck and the note 'The sign of the four' beside him.

What happens

Holmes, Watson, and Miss Morstan accompany Thaddeus Sholto to Pondicherry Lodge, where they discover his twin brother Bartholomew dead in a locked room, with a poisoned thorn in his neck and the note 'The sign of the four' beside him. The treasure is missing, and Thaddeus is distraught with fear of suspicion.

Free preview opens on this chapter — companions, themes, and character notes appear beside the text.

Narrative arc

Story tension across the book — this chapter sits in Exposition.

SetupEscalationClimax
  • Setup
  • Escalation
  • Breaking point

In this excerpt, the emotional and psychological peak occurs when Jonathan Small reveals he has thrown the tre…

Full beat labels and climax notes unlock in the reader.

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Themes in this chapter

  • The Limits of Detection

    Holmes's methodical examination of the crime scene reveals clues, but the locked-room mystery and poisoned thorn initially baffle Watson, highlighting the boundaries of immediate understanding.

  • Justice vs. Revenge

    The murder of Bartholomew Sholto and the theft of the treasure set the stage for a conflict between lawful investigation and the vengeful motives of the perpetrators.

Characters to notice

  • Sherlock Holmes

    Leads the investigation, examines the crime scene with his lens, deduces the murder method, and reassures Thaddeus.

  • Dr. John Watson

    Accompanies Holmes, assists in forcing the door, and recoils in horror at the sight of Bartholomew's face through the keyhole.

  • Thaddeus Sholto

    Trembling and terrified, he leads the party to the lodge, discovers his brother's body, and panics about being suspected of murder.

  • Mary Morstan

    Remains behind with the frightened housekeeper while Holmes and Watson ascend to the chamber.

  • Bartholomew Sholto

    Found dead in his locked laboratory, with a poisoned thorn in his neck and a note reading 'The sign of the four.'

  • McMurdo

    The porter at Pondicherry Lodge, initially refuses entry but recognizes Holmes as a former boxing opponent and admits the party.

Key passages

  • “There is something devilish in this, Watson”

    Holmes senses something sinister about the situation.

    Holmes expresses unease after peering through the keyhole.

  • “It means murder”

    Holmes confirms that a murder has occurred.

    Holmes interprets the note 'The sign of the four' as evidence of murder.

  • “The treasure is gone!”

    Thaddeus realizes the treasure has been stolen.

    Thaddeus exclaims that the treasure has been taken from the room.