The Big Four · Chapter
The Mouse Walks In explained
Hastings is captured by the Big Four and forced to write a letter luring Poirot into a trap, with the threat of his wife's torture as leverage.
What happens
Hastings is captured by the Big Four and forced to write a letter luring Poirot into a trap, with the threat of his wife's torture as leverage. He attempts to warn Poirot through coded signs (four books, coal arrangement). Poirot, understanding the warning, arrives prepared with a smoke bomb and police backup, rescues Hastings, and captures the operatives. Hastings collapses in despair over his wife's continued captivity.
Themes in this chapter
Deception and Disguise
Hastings is forced to write a deceptive letter; Poirot uses a muffler to hide his respirator; the Big Four use a street urchin as a decoy.
Sacrifice and Loyalty
Hastings risks his life to warn Poirot at the last moment, despite the threat to his wife.
Science and Technology as Weapons
Poirot uses a chemist-designed smoke bomb to incapacitate the captors.
Characters to notice
- Captain Hastings
Captured and coerced into writing a decoy letter; later rescued by Poirot.
- Hercule Poirot
Deciphers Hastings' warning signs, arrives prepared with a smoke bomb and police, rescues Hastings.
- Number Four
Dictates the deceptive letter to Hastings; orchestrates the trap.
- Li Chang Yen
Mentioned as the master who devises tortures, though not present in the scene.
- Inspector Japp
His men assist Poirot by watching the house and following to Limehouse.
- Flossie Monro
Referred to as 'Cinderella' and 'the Rose of the Garden'; Hastings' wife held captive by the Big Four.
Key passages
“cover up those precious moustaches of yours in case anyone's watching out from the house and might recognize you.”
Hide your distinctive moustache so you aren't spotted by lookouts.
Part of the dictated letter; ironically allows Poirot to conceal his respirator.
“Release the white bird with all despatch.”
Set free the captured woman immediately.
The cable Number Four promises to send if Poirot is captured.
“Back, Poirot! ... It's a trap. Never mind me. Get away at once.”
Flee, Poirot! This is a setup. Don't worry about me; save yourself.
Hastings' last-minute warning to Poirot, sacrificing his own safety.