The Mystery of the Blue Train · Chapter
An Aristocratic Gentleman explained
Derek Kettering is questioned by the magistrate and Poirot about his whereabouts on the night of the murder.
What happens
Derek Kettering is questioned by the magistrate and Poirot about his whereabouts on the night of the murder. He denies seeing his wife on the train and scoffs at the idea of being a suspect. Poirot notes that Kettering knew about the rubies, which had not been publicly mentioned. The Comte de la Roche is also interrogated; he provides an alibi and is released, though the police plan to shadow him. The maid Ada Mason is unable to positively identify the Comte as the man who entered Ruth's compartment.
Themes in this chapter
Deception and Appearances
Derek Kettering's confident demeanor and denial contrast with his suspicious knowledge of the rubies; the Comte de la Roche maintains a polished facade while his alibi is questioned.
Justice and Morality
The magistrate and Poirot work to uncover the truth, balancing legal procedure with moral judgment as they interrogate the suspects.
Characters to notice
- Derek Kettering
Questioned by the magistrate and Poirot; denies seeing his wife on the train and reveals knowledge of the rubies.
- Hercule Poirot
Observes Kettering's reactions and notes the discrepancy about the rubies; later questions the maid about the tickets.
- Comte de la Roche
Interrogated about his movements; provides an alibi and is released, though the police plan to shadow him.
- Ada Mason
Brought in to identify the Comte but cannot do so with certainty; questioned by Poirot about the tickets.
- M. Carrège
The examining magistrate who conducts the questioning of Kettering and the Comte.
- M. Caux
Present during the interrogations and comments on the suspicious behavior of Kettering and Mirelle.
Key passages
“My name is Hercule Poirot, and I am probably the greatest detective in the world.”
Poirot introduces himself to Derek Kettering with characteristic confidence, asserting his reputation as a top detective.
Poirot's self-introduction underscores his authority and sets the tone for his interrogation.
“Then how did he know about them?”
Poirot questions how Kettering learned of the rubies, since the information had not been made public.
This moment highlights a key inconsistency in Kettering's story and deepens Poirot's suspicion.
“It looks as though they were being careful.”
M. Caux suggests that Kettering and Mirelle's separate hotels indicate they are trying to avoid suspicion.
The observation points to the theme of deception and appearances.