Sainclair

In Which We Begin Not to Understand

The narrator, who recounts the story and introduces Rouletabille's involvement in the Yellow Room case.

In Which Joseph Rouletabille Appears for the First Time

The narrator and friend of Rouletabille; a lawyer who provides legal information and accompanies Rouletabille to the Château.

In the Bosom of Wild Nature

The narrator and reporter, who presents himself as a faithful 'reporter' and provides the retrospective details known through his business relations with Darzac.

In Which Joseph Rouletabille Makes a Remark to Monsieur Robert Darzac Which Produces Its Little Effect

Accompanies Rouletabille and serves as the narrator, observing the interactions between the key characters.

In the Heart of the Oak Grove

Narrates the events, observes the interactions between Rouletabille and Darzac, and accompanies them to the Yellow Room.

In Which Rouletabille Sets Out on an Expedition Under the Bed

The narrator and friend of Rouletabille, observes the examination, comments on the mystery, and compares it to Poe's 'The Murders in the Rue Morgue'.

VIII: The Examining Magistrate Questions Mademoiselle Stangerson

The narrator, present with Rouletabille during the wait and discussion.

IX: Reporter and Detective

Accompanies Rouletabille and questions the evidence, serving as the reader's surrogate.

We Shall Have to Eat Red Meat—Now

Narrates the chapter; accompanies Rouletabille and notes his friend's mysterious methods.

XII: Frédéric Larsan’s Cane

Accompanies Rouletabille, investigates the cane's purchase in Paris, and reports back that a man matching Darzac's description bought it.

XIII: “The Presbytery Has Lost Nothing of Its Charm, nor the Garden Its Brightness”

Arrives at the Glandier in response to Rouletabille's telegram, bringing revolvers; serves as the listener to Rouletabille's revelations.

I Expect the Assassin This Evening

Accompanies Rouletabille on a tour of the château and learns about the strange phenomenon and Rouletabille's expectations.

XIX: Rouletabille Invites Me to Breakfast at the Donjon Inn

The narrator, who listens to Rouletabille's reasoning and is absorbed in thought about Darzac's strange behavior.

An Act of Mademoiselle Stangerson

Reluctantly agrees to spy from the triangular closet, feeling like a common policeman but driven by curiosity and a desire to help.

On the Watch

Narrates the chapter, takes up position in the dark closet as instructed, and reflects on the danger of the night's work.

XXII: The Incredible Body

Narrator who revives Rouletabille, fires at the fleeing figure, and witnesses the discovery.

XXIII: The Double Scent

Narrator who accompanies Rouletabille and listens to his account of the night's discoveries.

XXV: Rouletabille Goes on a Journey

Narrator who accompanies Rouletabille to Paris and agrees to meet him the next day; expresses intention to give up the case.

XXVI: In Which Joseph Rouletabille Is Awaited with Impatience

Present at the trial as a witness, observing the proceedings and reporting on the atmosphere.

XXVII: In Which Joseph Rouletabille Appears in All His Glory

Narrator and friend of Rouletabille, observes the proceedings and speaks with Rouletabille after his initial appearance.

XXVIII: In Which It Is Proved That One Does Not Always Think of Everything

Narrates the chapter; questions Rouletabille about his deductions and the cane evidence.