# The Detective Detector explained — Short Fiction

> Chapter companion for Short Fiction by O. Henry.

## What happens

The narrator walks with Avery Knight, a notorious criminal, who boasts he can find the detective assigned to catch him within 48 hours. After Knight commits a murder in Central Park, he uses a reverse-induction method to locate Detective Shamrock Jolnes staking out Andrew Carnegie's residence, proving his claim.

## Themes in this chapter

### Crime and Consequence

Knight commits a brazen murder and robbery, then outwits the detective system, highlighting the disconnect between crime and punishment in New York.

### Humor and Irony

The ironic twist that Knight finds the detective by doing the opposite of what the detective expects, and the detective is staking out a wealthy philanthropist instead of the actual murderer.

### Deception and Appearance vs. Reality

Knight's reverse-induction method relies on the detective's flawed assumptions, and the narrator is deceived into thinking the feat impossible.

## Character check-ins

### Unknown Narrator

The narrator, a doctor, walks with Avery Knight and witnesses his murder and subsequent detective-hunting feat.

### Shamrock Jolnes

The famous detective assigned to the murder case, found by Knight staking out a mansion.

## Key lines

> I slew the man in Central Park. Now, let me describe myself to you. I am tall, with a black beard, and I hate publicity. I have no money to speak of; I do not like oatmeal, and it is the one ambition of my life to die rich.

Knight describes himself as a tall, bearded man who shuns fame, is poor, dislikes oatmeal, and wants to die wealthy.

_Knight uses this self-description to deduce the detective's opposite approach._

> I assumed that the detective would go exactly opposite to the clues he had. I have given you a description of myself. Therefore, he must necessarily set to work and trail a short man with a white beard who likes to be in the papers, who is very wealthy, is fond of oatmeal, wants to die poor, and is of an extremely generous and philanthropic disposition.

Knight reasoned the detective would seek the opposite of his own traits, leading him to a short, white-bearded, wealthy, charitable man who loves publicity and oatmeal.

_This explains how Knight located Jolnes staking out Andrew Carnegie's home._

## Links

- HTML: https://www.betterreads.online/discover/short_fiction_41_se/chapters/the-detective-detector
- Book: https://www.betterreads.online/discover/short_fiction_41_se
- All chapters: https://www.betterreads.online/discover/short_fiction_41_se/chapters