The Red Thumbmark · Chapter
XIII: Murder by Post explained
Thorndyke and Jervis examine a poisoned cigar sent to Thorndyke, analyzing the clues it provides about the sender's identity and motives.
What happens
Thorndyke and Jervis examine a poisoned cigar sent to Thorndyke, analyzing the clues it provides about the sender's identity and motives. Thorndyke deduces that the sender is likely a person he alone suspects of a crime, and that the attempt is linked to his professional investigations. He reveals his private journal of theoretical crimes, noting that the poisoned cigar method is one he had previously documented. The chapter ends with Thorndyke deciding to have the cigar analyzed before taking further action.
Themes in this chapter
Forensic Science and Evidence
Thorndyke meticulously examines the cigar, label, and typewriting to gather clues about the sender, demonstrating forensic analysis of physical evidence.
Observation and Deduction
Thorndyke uses careful observation of the label's typewriting, paper cutting, and other details to deduce the sender's identity and motives.
Deception and Betrayal
The poisoned cigar represents a deceptive attempt on Thorndyke's life, likely by someone he suspects of a crime, highlighting betrayal and hidden enmity.
Characters to notice
- Dr. John Evelyn Thorndyke
Receives and analyzes a poisoned cigar, deducing the sender's motives and identity through forensic examination of the packaging and typewriting.
- Dr. Christopher Jervis
Assists Thorndyke in examining the cigar and packaging, expresses concern for Thorndyke's safety, and learns about Thorndyke's private journal of theoretical crimes.
Key passages
“Our ingenious friend again, I surmise, said Thorndyke at length, taking up one of the halves and examining the white patch through his lens. A thoughtful soul, Jervis, and original too. I wish his talents could be applied in some other direction.”
Thorndyke remarks that the sender of the poisoned cigar is clever and original, but he wishes the person would use his skills for good rather than crime.
Thorndyke's initial reaction to the poisoned cigar, showing his analytical and somewhat detached perspective.
“It is your duty to society, Thorndyke, I exclaimed passionately, to have this infernal, cold-blooded scoundrel arrested instantly. Such a man is a standing menace to the community.”
Jervis urges Thorndyke to immediately arrest the poisoner, arguing that the man is a danger to everyone.
Jervis expresses strong moral outrage and concern for public safety.
“The sender of this offering is probably a person concerning whom I hold certain exclusive information.”
Thorndyke deduces that the person who sent the cigar is someone he alone suspects of a crime.
Thorndyke's key deduction linking the attempt on his life to his professional knowledge.