Protagonist

  Arthur Havelock (private detective)

  Age: 38

  Role: Private detective, invited to investigate a murder.

  Character: Calm, reserved, logical.

  Characteristics: takes notes in a notebook, likes solitude and reading.

  Motivation: Show himself that he can solve complex cases.

  Role in the plot: Arthur conducts an investigation and gradually reveals connections between the suspects.

  2. Victim

  Lord Edmund Livingston

  Age: 60

  Role: The owner of the mansion, killed under mysterious circumstances.

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  Character: Arrogant, despotic, suspicious.

  Characteristics: Wore an antique ring that no one had seen before.

  Cause of death: Killed with a blow to the head in a library locked from the inside.

  Role in the plot: His murder becomes the central mystery of the novel.

  3. Suspects

  Lady Eleanor Livingstone (wife)

  Age: 50

  Character: Reserved, hidden offensive, outwardly cold, plump.

  Motivation: Fear of preserving his fortune due to rewriting wills.

  Edward Livingstone (eldest son)

  Age: 30

  Character: Proud, hot-tempered, ambitious.

  Motivation: was afraid that his father would pass on the family business to his younger brother Robert.

  Robert Livingstone (youngest son)

  Age: 25

  Character: Calm, creative, indecisive.

  Motivation: Did not want to interfere in the family business, but was under pressure from his father.

  Victoria Livingstone (daughter)

  Age: 28

  Character: Confident, decisive, but hidden.

  Motivation: Her father tried to restore her marriage against her will.

  4. Servants and acquaintances

  Jonathan Reid (butler)

  Age: 55

  Character: Strict, loyal, disciplined.

  Motivation: afraid of presentation after many years of service.

  Mrs. Harper (economist)

  Age: 45-50

  Character: Serious, demanding, secretive.

  Motivation: afraid of exposure due to the loss of ecological things and possible implementation.

  Dr. Richard Morley (friend)

  Age: 50

  Character: Smart, charming, but secretive.

  Motivation: Financial dependence on Lord Livingston and fear of losing support.