The Mystery of the Yellow Room · Character

Daddy Jacques

The loyal old servant who was in the laboratory when the murder cry rang out, and whose attic sits directly above the Yellow Room.

supporting

Also known as Jacques, Daddy

First appearance: the mystery of the yellow room

As a supporting figure in The Mystery of the Yellow Room, Daddy Jacques is not background color—the story leans on what they do once the chapter opens.

The old servant who was in the laboratory with Professor Stangerson and discovered the locked room; his revolver was used by the assassin.

In the storyIn Which We Begin Not to UnderstandOpen this moment free

Daddy Jacques is the honest, garrulous servant whose testimony provides the first detailed account of the night of the crime. He was cleaning instruments in the laboratory, heard Mademoiselle lock her door, heard the cat miaow, and then heard the desperate cry and the revolver shots. His attic room above the Yellow Room makes him both a witness and a potential witness to any escape route, and his simple, affectionate loyalty to Mademoiselle — 'Daddy Jacques is an honest man and very attached to me' — makes his account both credible and incomplete. He is the reader's first guide into the facts of the case, and his limitations as a narrator are part of the mystery's design.

See Daddy Jacques in In Which We Begin Not to Understand Book page

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Character Web

11 connections

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

Relationship types

Friendship
Rivalry
Social

Character groups

Primary suspects and victims
Protagonist
Supporting witnesses and officials

+6 more in the full Character Web

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Narrative arc

Story tension across the book.

Setup
Escalation
Breaking point
Aftermath
Closing

This is the story's dramatic climax because it marks the emotional and psychological peak where Rouletabille’s…

Full beat labels and climax notes unlock in the reader.

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Relationships

Joseph Rouletabille
friendship · positive
Daddy Jacques is a loyal and helpful ally to Rouletabille, often assisting him with local… How this plays out →
Frédéric Larsan
rivalry · negative
Mademoiselle Stangerson
friendship · positive
The Green Man
rivalry · negative
Daddy Mathieu
social · positive
Joseph Rouletabille
friendship · positive
Daddy Jacques is a loyal and helpful ally to Rouletabille, often assisting him with local… How this plays out →
Frédéric Larsan
rivalry · negative
Mademoiselle Stangerson
friendship · positive
Joseph Rouletabille
friendship · positive
Daddy Jacques is a loyal and helpful ally to Rouletabille, often assisting him with local… How this plays out →
Mademoiselle Stangerson
friendship · positive
Frédéric Larsan
rivalry · negative
The Green Man
rivalry · negative

Joseph Rouletabille
Daddy Jacques is a loyal and helpful ally to Rouletabille, often assisting him with local knowledge and support.
Frédéric Larsan
Daddy Jacques distrusts Larsan and often works against his methods, creating a tense opposition.
Mademoiselle Stangerson
Daddy Jacques is a protective and caring figure toward Mademoiselle Stangerson, acting as a loyal servant.
The Green Man
Daddy Jacques actively tries to expose and capture the Green Man, viewing him as a threat.
Daddy Mathieu
Daddy Jacques and Daddy Mathieu are fellow servants and acquaintances who share information about the case.
Joseph Rouletabille
Daddy Jacques is a loyal and helpful ally to Rouletabille, often assisting him with local knowledge and support.
Frédéric Larsan
Daddy Jacques distrusts Larsan and often works against his methods, creating a tense opposition.
Mademoiselle Stangerson
Daddy Jacques is a protective and caring figure toward Mademoiselle Stangerson, acting as a loyal servant.
Joseph Rouletabille
Daddy Jacques is a loyal and helpful ally to Rouletabille, often assisting him with local knowledge and support.
Mademoiselle Stangerson
Daddy Jacques is a protective and caring figure toward Mademoiselle Stangerson, acting as a loyal servant.
Frédéric Larsan
Daddy Jacques distrusts Larsan and often works against his methods, creating a tense opposition.
The Green Man
Daddy Jacques actively tries to expose and capture the Green Man, viewing him as a threat.

Relationship notes

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

See Daddy Jacques in the mystery of the yellow room

In the story

Daddy Jacques appears across 11 companion beats. Open any chapter in the free preview to see the notes beside the text.

In Which We Begin Not to Understand
The old servant who was in the laboratory with Professor Stangerson and discovered the locked room; his revolver was used by the assassin.
In Which Joseph Rouletabille Appears for the First Time
Mentioned as the occupant of the attic above the Yellow Room; Sainclair speculates he might be involved, but Rouletabille dismisses this.
In the Heart of the Oak Grove
Found at the window of the Yellow Room, comments on Frédéric Larsan's investigation and the difficulty of solving the mystery.
In Which Rouletabille Sets Out on an Expedition Under the Bed
Guides Rouletabille and Sainclair through the Yellow Room, explains the layout and the night-light, and mutters about the 'Bête du bon Dieu' as a possible culprit.
In Which Frédéric Larsan Explains How the Murderer Was Able to Get Out of The Yellow Room
Summoned to the laboratory along with the concierges for the discussion.
XV: The Trap
Assists Rouletabille by waking Professor Stangerson and helping with the ladder.
Strange Phenomenon of the Dissociation of Matter
Converges from the other end of the gallery and feels the murderer's breath on his face.
The Inexplicable Gallery
Present in the room, blows his nose emotionally, and later describes seeing a man with a red beard and red hair.
XXII: The Incredible Body
Helps carry the body and shows grief; noted to be fully clothed.
XXIII: The Double Scent
Confesses to following the black phantom at night, but denies walking with it; his clothes are wet and muddy.
XXVIII: In Which It Is Proved That One Does Not Always Think of Everything
Receives a 'no cause for action' and is freed.

Chapter companion notes

Spoil-light check-ins for Daddy Jacques unlock in the free preview.

See Daddy Jacques in the mystery of the yellow room

See Daddy Jacques in In Which We Begin Not to Understand