The Charing Cross Mystery · Chapter
The Assurance explained
Hetherwick and Rhona discuss the case and the motive for the murders, suspecting Baseverie and Ambrose sought both the ink formula and blackmail.
What happens
Hetherwick and Rhona discuss the case and the motive for the murders, suspecting Baseverie and Ambrose sought both the ink formula and blackmail. A policeman summons them to Matherfield's office, where two chemists, Culthwaite and Houseover, confirm that Baseverie tried to sell them the formula for a new black ink, which they identify as Hannaford's invention. Rhona identifies her grandfather's handwriting on the formula. Hetherwick and Rhona share a tender moment, confirming their mutual affection.
Themes in this chapter
Greed and Materialism
The motive for the murders is revealed to be the desire to profit from Hannaford's ink formula and blackmail Lady Riversreade and Madame Listorelle.
Blackmail and Crime
The blackmail plot against Lady Riversreade and Madame Listorelle is discussed as a secondary motive for the murders.
Justice and Investigation
The investigation progresses with the discovery of the ink formula, providing a key piece of evidence against Baseverie.
Characters to notice
- Mr. Hetherwick
Discusses the case with Rhona, accompanies her to Matherfield's office, and shares a romantic moment with her.
- Rhona Hannaford
Identifies her grandfather's handwriting on the ink formula, discusses the motives for the murder, and reciprocates Hetherwick's affection.
- Mr. Matherfield
Summons Hetherwick and Rhona to his office, introduces the chemists Culthwaite and Houseover, and reveals the discovery of the formula.
- Dr. Charles Ambrose
Mentioned as a suspect who, along with Baseverie, murdered Hannaford and Granett for the ink formula and blackmail.
- James Granett
Mentioned as a victim who paid the penalty for being with Hannaford.
- Superintendent Hannaford
His handwriting is identified on the ink formula; his murder is discussed as the central crime.
Key passages
“I put it this way—always have done: they thought they could sell grandfather’s invention for a lot of money, and get another lot out of Lady Riversreade and Madame Listorelle as blackmail.”
Rhona explains her theory that the murderers intended to profit both from selling the ink formula and from blackmailing the two women.
Rhona summarizes the dual motive for the crimes.
“These gentlemen, Miss Hannaford and Mr. Hetherwick, are Messrs. Culthwaite and Houseover, manufacturing chemists, of East Ham—incidentally, they’ve also a big place in Lancashire.”
Matherfield introduces the chemists who have come forward with evidence about the ink formula.
The chemists provide the missing link in the case.
“That’s the formula for the ink! Now we’ve got the big thing we wanted!”
Matherfield announces that the formula is the crucial piece of evidence they needed.
The discovery of the formula is a major breakthrough.
“Did I kiss you? ... Why, of course, you did! Twice!”
Hetherwick asks Rhona if he kissed her when they reunited, and she confirms it, teasing him.
A romantic moment between Hetherwick and Rhona.