# XVI: Poirot Discusses the Case explained — The Mystery of the Blue Train

> Chapter companion for The Mystery of the Blue Train by Agatha Christie.

## What happens

Poirot discusses the case with Van Aldin, the Commissary, and the Examining Magistrate. Van Aldin reveals that he offered Derek Kettering one hundred thousand pounds to agree to an undefended divorce, but Kettering refused. The police suspect the Comte de la Roche of murdering Ruth Kettering, but Poirot shows skepticism. Van Aldin hires Poirot to investigate personally, and Poirot extracts further details about the divorce proceedings and Kettering's financial troubles.

## Themes in this chapter

### Deception and Appearances

Van Aldin initially lies about further communications with Derek Kettering, and the police's confident theory about the Comte de la Roche is questioned by Poirot.

### Greed and Materialism

The offer of one hundred thousand pounds for an undefended divorce and Derek Kettering's inheritance of two million pounds underscore the role of money in personal relationships.

### Justice and Morality

Poirot's insistence on truth and his decision to investigate for Van Aldin reflect a pursuit of justice beyond the police's initial conclusions.

## Character check-ins

### Hercule Poirot

Poirot leads the discussion, challenges the police's theory, and agrees to work for Van Aldin.

### Rufus Van Aldin

Van Aldin admits to offering Derek Kettering money for an undefended divorce and hires Poirot to investigate the murder.

### Derek Kettering

Discussed as the husband who refused a divorce bribe, traveled with Mirelle, and inherits two million pounds from Ruth's death.

### Ruth Kettering

The victim; her divorce plans and financial settlement are central to the discussion.

### Mirelle

Mentioned as the dancer accompanying Derek Kettering on the Blue Train and as the cause of Ruth's divorce complaint.

### Comte de la Roche

The primary suspect according to the police; Poirot questions this theory.

## Key lines

> I sent my secretary, Major Knighton, to see him, with instructions to offer him the sum of one hundred thousand pounds in cash if the divorce went through undefended.

Van Aldin reveals he had Knighton offer Derek Kettering £100,000 to not contest the divorce.

_This admission shows Van Aldin's attempt to buy Kettering's compliance._

> He sent back word that I could go to hell

Kettering refused the bribe with a rude dismissal.

_Highlights Kettering's defiance and pride._

> I moralise, I reflect, I speak the philosophy. But to return to where we were.

Poirot acknowledges his tendency to philosophize before steering the conversation back to facts.

_Shows Poirot's characteristic blend of reflection and pragmatism._

## Links

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