Austin Ponson

Inspector Tanner

Austin is a key suspect and later ally, interacting heavily with Tanner during the investigation.

Jimmy Daunt

Austin and Jimmy appear to be close friends or allies, with frequent interactions indicating mutual support.

Sir William Ponson

Austin is Sir William's son, and their interactions reflect a strained or complex father-son dynamic.

Lois Drew

Austin and Lois are acquaintances within the same social circle, possibly with underlying romantic or friendly tension.

Cosgrove Ponson

Austin and Cosgrove are brothers, with their interactions suggesting sibling rivalry or conflict.

Inspector Tanner

Austin is a key suspect and later ally, interacting heavily with Tanner during the investigation.

Jimmy Daunt

Austin and Jimmy appear to be close friends or allies, with frequent interactions indicating mutual support.

Sir William Ponson

Austin is Sir William's son, and their interactions reflect a strained or complex father-son dynamic.

Inspector Tanner

Austin is a key suspect and later ally, interacting heavily with Tanner during the investigation.

Lois Drew

Austin and Lois are acquaintances within the same social circle, possibly with underlying romantic or friendly tension.

Lois Drew

Austin and Lois are acquaintances within the same social circle, possibly with underlying romantic or friendly tension.

Cosgrove Ponson

Austin and Cosgrove are brothers, with their interactions suggesting sibling rivalry or conflict.

Mystery at Luce Manor

Sir William's relative or associate; arrives at Luce Manor, questions the boatman, and shows nervousness at the developments.

A Sinister Suggestion

Discovers his father's body and sends a telegram to Cosgrove Ponson.

III: Hoaxed?

Nervously recounts being hoaxed by a note and a maid on the night of Sir William's death; shows visible fear during the inquest.

IV: Inspector Tanner Grows Suspicious

Sir William's son; engaged to Lois Drew against his father's wishes, inherits £150,000; his alibi is under scrutiny.

Inspector Tanner Becomes Convinced

Suspect in his father's murder; Tanner considers evidence against him but later believes his alibi.

VII: Cosgrove's Trip North

Mentioned as a suspect Tanner has been investigating, but the chapter focuses on Cosgrove's alibi.

Tanner Finds Himself Duped

Present at the inquest, visibly anxious; later arrested for his father's murder based on circumstantial evidence and witness testimony, though he protests his innocence.

IX: Lois Drew Takes a Hand

Writes to Lois breaking their engagement; is visited by Jimmy Daunt in prison and agrees to hire him as his solicitor; tells Daunt his version of events.

X: A Woman's Wit

Currently arrested; Lois and Daunt work to prove his innocence.

A Fresh Start

Austin is under arrest; his photograph is identified as one of the men who met Sir William at the Soho restaurant.

XIII: Blackmail?

Arrested then cleared again; Daunt discovers he lied about meeting Sir William for lunch, and he reacts with consternation to news of Douglas's arrest.

A Dramatic Discovery

Revealed to be illegitimate due to his mother's bigamous marriage.

In the Luce Manor Boathouse

Despondent in his cell, then transformed by Lois's letter; confesses the boathouse plot to Daunt.

Conclusion

Makes a statement, is tested on small details, and is set free after charges are withdrawn.