# VII: From Leyland’s Notebook explained — The Three Taps

> Chapter companion for The Three Taps by Ronald A. Knox.

## What happens

Inspector Leyland, having placed a bet with Bredon on his theory, begins to doubt his own conclusions. He meticulously records his reasoning, focusing on the turned-off gas tap and the open window as evidence of foul play. He argues that the window was deliberately opened after death, the match found in the grate was not used by the maid, and the sleeping draught glass was staged to suggest suicide. Leyland reconstructs the murderer's actions, including winding the watch and leaving a half-finished letter, and considers motives involving Mottram's wealth and a possible local vendetta. He remains confident in murder despite the locked-room puzzle.

## Themes in this chapter

### Detection and Rationality

Leyland's notebook exemplifies rational deduction, systematically analyzing evidence like the gas tap, window, and match to build a case for murder.

### Deception and Fraud

The chapter focuses on the murderer's staged suicide scene—the half-finished letter, wound watch, and sleeping draught glass—as acts of deception.

### Appearance vs. Reality

Leyland argues that the apparent suicide signs are deliberately crafted by the murderer to mislead, contrasting surface appearances with the true murder.

## Character check-ins

### Mr. Leyland

The narrator of the chapter; records his evolving theory of murder, doubting his own certainty after betting with Bredon.

### Miles Bredon

Referenced as the one Leyland bet with and whose views on suicide he seeks to counter; his suggestion about the match is dismissed.

### Mr. Brinkman

Mentioned as a possible suspect; uses matches of the ordinary kind, but Leyland finds his manner secretive and no clear motive.

### Mr. Pulteney

Exonerated by Leyland as a complete stranger to Mottram; his accurate observation about the east wind is cited.

### Mr. Mottram

The deceased; Leyland analyzes his actions (ordering an early wake-up, not taking the sleeping draught) to argue against suicide.

### Simmonds

Mottram's nephew and heir to the shop; mentioned as having quarreled with Mottram over politics, providing a possible motive.

## Key lines

> Now that I have put that fiver on with Bredon, I begin to doubt my own conclusions. That is the extraordinary effect of having a 'will to believe.'

After betting Bredon five pounds on his theory, Leyland starts questioning his certainty, noting how wanting something to be true can undermine objective reasoning.

_Leyland reflects on the psychological impact of his wager on his investigative confidence._

> The fact that the gas was tampered with would convince me of foul play, even if there were no other direct indications.

The interference with the gas tap alone is enough to prove murder to Leyland, regardless of other clues.

_Leyland emphasizes the gas tap as the crucial piece of evidence for murder._

> We have to deal with a murderer who is anxious to create the impression that the victim has died by his own hand.

The killer is deliberately staging the scene to look like suicide.

_Leyland's core theory: the murderer is using double bluff to mislead investigators._

> Why did the murderer turn the gas off? And how did he leave the door locked behind him?

Two central mysteries remain: the motive for turning off the gas and the method of locking the door from the outside.

_Leyland identifies the key puzzles that still need solving._

## Links

- HTML: https://www.betterreads.online/discover/the_three_taps_se/chapters/vii-from-leyland-s-notebook
- Book: https://www.betterreads.online/discover/the_three_taps_se
- All chapters: https://www.betterreads.online/discover/the_three_taps_se/chapters