The Mystery of the Yellow Room · Chapter
In Which Frédéric Larsan Explains How the Murderer Was Able to Get Out of The Yellow Room explained
The chapter presents the Registrar's narrative of an unconventional examination in the Yellow Room, where the examining magistrate abandons formal interrogation and gathers all parties to discuss the crime freely.
What happens
The chapter presents the Registrar's narrative of an unconventional examination in the Yellow Room, where the examining magistrate abandons formal interrogation and gathers all parties to discuss the crime freely. Rouletabille reveals his discovery of a newspaper advertisement for a lost brass-headed key, linking it to Mademoiselle Stangerson and suggesting the murderer possessed the key before the attack. Professor Stangerson swears he never left the door and does not know the murderer, but Rouletabille privately expresses belief in him.
Themes in this chapter
Secrecy and Silence
Mademoiselle Stangerson's secret loss of the key and her attempt to recover it via a poste restante advertisement highlight the theme of hidden information and its consequences.
The Role of the Press
Rouletabille's use of a newspaper advertisement as a crucial clue demonstrates the press's role in uncovering secrets and advancing the investigation.
Characters to notice
- Joseph Rouletabille
Presents the key advertisement clue and later privately tells Professor Stangerson he believes him.
- Professor Stangerson
Swears solemnly that he never left the door and does not know the murderer; reveals his daughter kept the key.
- Frédéric Larsan
Chief of the Sûreté, present during the examination; his earlier explanation of the murderer's escape is referenced.
- Monsieur de Marquet
Examining magistrate who orchestrates the informal discussion and expresses frustration at the case.
- Monsieur Robert Darzac
Present in the laboratory during the examination.
- Daddy Jacques
Summoned to the laboratory along with the concierges for the discussion.
Key passages
“I swear by the head of my suffering child that I never for an instant left the door of her chamber after hearing her cries for help; that that door was not opened while I was alone in the laboratory; and that, finally, when we entered The Yellow Room, my three domestics and I, the murderer was no longer there! I swear I do not know the murderer!”
Professor Stangerson swears on his daughter's life that he never left the door, it remained closed, and the murderer was gone when they entered.
This solemn oath underscores the impossibility of the crime as perceived by the characters.
“The robbery could only have been committed before the attack upon Mademoiselle Stangerson in her room. When the murderer entered the pavilion he already possessed the brass-headed key.”
Rouletabille argues the key was stolen before the attack, meaning the murderer had it when he entered.
This deduction shifts the timeline of events and challenges earlier assumptions.