The Red Thumbmark · Chapter
X: Polton Is Mystified explained
Jervis returns from a visit with Juliet Gibson, who reveals that she cut her finger in Mr.
What happens
Jervis returns from a visit with Juliet Gibson, who reveals that she cut her finger in Mr. Hornby's study on the day of the diamond robbery, and that Reuben Hornby helped bandage it, leaving bloody fingerprints on papers. Jervis shares this information with Thorndyke, who listens attentively but seems unmoved, leading Jervis to suspect Thorndyke already knows or has another explanation. Polton enters with a set of twenty-four boxwood pieces, and Thorndyke playfully critiques Jervis's use of the word 'guess,' demonstrating deductive reasoning by identifying a former stationmaster from his gait. Later, Jervis reflects on his growing feelings for Juliet and her frank, affectionate manner, while also noting that Walter Hornby may have sold his mining shares before a slump, raising questions about his role in the family's financial troubles.
Themes in this chapter
Observation and Deduction
Thorndyke demonstrates deductive reasoning by identifying a former stationmaster from his gait, critiquing Jervis's use of 'guess' and emphasizing conclusions based on data.
Deception and Betrayal
Juliet's revelation about Walter Hornby selling his mining shares before a slump hints at possible financial deception or self-interest.
Love and Self-Sacrifice
Jervis reflects on his growing love for Juliet, acknowledging the pain it will bring him when he must leave, yet he would not change his feelings.
Characters to notice
- Dr. Christopher Jervis
Returns from visiting Juliet, reports her story to Thorndyke, and reflects on his romantic feelings for her.
- Dr. John Evelyn Thorndyke
Listens to Jervis's report with critical attention but appears unmoved; later demonstrates deductive reasoning about a stationmaster's gait.
- Juliet Gibson
Reveals she cut her finger in Mr. Hornby's study on the day of the robbery, leading to Reuben's bloody fingerprints on papers.
- Polton
Enters with a drawing-board of boxwood pieces, mystified by their purpose, and is impressed by Thorndyke's deduction.
- Reuben Hornby
Mentioned as having helped bandage Juliet's finger, leaving bloody fingerprints on papers in Mr. Hornby's study.
- Walter Hornby
Mentioned as having sold his mining shares before a slump, raising questions about his financial dealings.
Key passages
“I was not long in finishing my notes, for I was in a fever of impatience to hear Thorndyke's comments on my latest addition to our store of information.”
Jervis quickly finished writing because he was eager to hear Thorndyke's thoughts on the new information.
Shows Jervis's eagerness to share Juliet's story and get Thorndyke's analysis.
“The obvious moral is, never disregard the improbable.”
The lesson is to always consider unlikely possibilities.
Thorndyke advises Jervis to keep an open mind about improbable theories.
“I like not that word 'guess' in the mouth of a man of science.”
Thorndyke disapproves of the word 'guess' being used by a scientist.
Thorndyke emphasizes the importance of data-driven conclusions over speculation.