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.