The Mystery of the Blue Train · Character

Major Knighton

Van Aldin's discreet, efficient secretary, whose quiet competence and unreadable loyalty make him a fixed point in a world of shifting suspects.

supporting

Also known as Knighton, Richard Knighton

First appearance: In Curzon Street

As a supporting figure in The Mystery of the Blue Train, Major Knighton is not background color—the story leans on what they do once the chapter opens.

Van Aldin's secretary, sorting correspondence in the suite; he is shown the Heart of Fire rubies.

In the storyHeart of FireOpen this moment free

Knighton serves as right hand to the American millionaire Van Aldin, handling sensitive business with a tact that keeps him close to every development in the Kettering case. His very self-effacement makes him hard to read: is he merely the faithful functionary he appears, or does his proximity to great wealth and private grief conceal something more complicated? As the investigation gathers pace, his steady presence at Van Aldin's side quietly shapes which facts reach the detective and which do not.

See Major Knighton in Heart of Fire Book page

Free preview opens at this moment — character cards, Character Web, and themes sit beside the text as you read.

Character Web

18 connections

A slice of how Major Knighton sits in the book — open the reader for the full interactive map.

Relationship types

Professional
Friendship
Other

Character groups

Key suspects and witnesses
Supporting cast and background
Protagonist

+13 more in the full Character Web

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Narrative arc

Story tension across the book — this chapter sits in Exposition.

Setup
Escalation
Breaking point
Aftermath
Closing

In this scene, the emotional and psychological peak occurs when Poirot’s tone shifts to an uncharacteristic se…

Full beat labels and climax notes unlock in the reader.

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Relationships

Ruth Kettering
professional · positive
Knighton serves as Ruth's secretary and confidant, handling her affairs with loyalty. How this plays out →
Hercule Poirot
professional · ambivalent
Katherine Grey
friendship · positive
Ruth Kettering
professional · positive
Knighton serves as Ruth's secretary and confidant, handling her affairs with loyalty. How this plays out →
Ruth Kettering
professional · positive
Knighton serves as Ruth's secretary and confidant, handling her affairs with loyalty. How this plays out →
Hercule Poirot
professional · ambivalent
Hercule Poirot
professional · ambivalent
Katherine Grey
friendship · positive
Katherine Grey
friendship · positive

Ruth Kettering
Knighton serves as Ruth's secretary and confidant, handling her affairs with loyalty.
Hercule Poirot
Poirot interviews Knighton as a key witness and assistant in the case, maintaining polite cooperation.
Katherine Grey
Katherine and Knighton share a cordial, supportive relationship as they assist Poirot.
Ruth Kettering
Knighton serves as Ruth's secretary and confidant, handling her affairs with loyalty.
Ruth Kettering
Knighton serves as Ruth's secretary and confidant, handling her affairs with loyalty.
Hercule Poirot
Poirot interviews Knighton as a key witness and assistant in the case, maintaining polite cooperation.
Hercule Poirot
Poirot interviews Knighton as a key witness and assistant in the case, maintaining polite cooperation.
Katherine Grey
Katherine and Knighton share a cordial, supportive relationship as they assist Poirot.
Katherine Grey
Katherine and Knighton share a cordial, supportive relationship as they assist Poirot.

Relationship notes

How these ties play out is in the reading companion — open the free preview.

See Major Knighton in In Curzon Street

In the story

Major Knighton appears across 14 companion beats. Open any chapter in the free preview to see the notes beside the text.

Heart of Fire
Van Aldin's secretary, sorting correspondence in the suite; he is shown the Heart of Fire rubies.
In Curzon Street
Van Aldin's secretary, who is instructed to arrange meetings with Mr. Goby and Derek Kettering.
A Useful Gentleman
Van Aldin's secretary; announces Mr. Goby's arrival and later ushers Derek Kettering into the room.
An Offer Refused
Knighton delivers Van Aldin's offer to Derek, acting as an unwilling messenger.
Van Aldin Gets a Telegram
Secretary to Van Aldin, reports seeing Ruth's maid in Paris and helps arrange travel after the murder news.
Katherine Makes a Friend
Present at Van Aldin's suite, introduces Katherine, and later admits to being distracted by her.
At the Tennis
Invites Katherine to the tennis; discusses the case and his belief in Poirot's abilities.
A Warning
Knighton shyly declares his love for Katherine and offers his help if she is ever in trouble.
Interview with Mirelle
Seeks out Poirot to discuss Mirelle's request to see Van Aldin; arranges the interview with Mirelle despite Van Aldin's refusal.
Miss Viner Gives Judgment
Knighton writes to Katherine requesting a visit, comes to lunch, and shows clear affection for her.
XXXII: Katherine and Poirot Compare Notes
Mentioned as someone Katherine has seen since returning to England.
A New Theory
Present during the meeting; expresses surprise at the new theory and mentions having seen Katherine Grey.
The Blue Train Again
Accompanies Van Aldin and Poirot; is revealed to be the Marquis and is arrested at Lyons.
Explanations
Revealed as the mastermind behind the murder, working with Ada Mason; faked his limp and framed Derek Kettering.

Chapter companion notes

Spoil-light check-ins for Major Knighton unlock in the free preview.

See Major Knighton in In Curzon Street

See Major Knighton in Heart of Fire