The Hollow Needle · Character

Isidore Beautrelet

A sixth-form schoolboy whose schoolfellows rank him beside Holmlock Shears, he treats a country-house theft as a problem in pure reasoning.

major

Also known as M. Isidore Beautrelet, Beautrelet, young Isidore Beautrelet, young Beautrelet, M. Beautrelet, poor Isidore Beautrelet, Monsieur Isidore Beautrelet

First appearance: II: Isidore Beautrelet, Sixth-Form Schoolboy

As a major figure in The Hollow Needle, Isidore Beautrelet is not background color—the story leans on what they do once the chapter opens.

A young student disguised as a reporter; claims to know the murderer's name and the stolen objects.

In the storyThe ShotOpen this moment free

Beautrelet is a Lycée Janson-de-Sailly pupil, industrious and of exemplary behavior, whose reputation as an observer whom nothing escapes has reached the examining magistrate before he ever appears in the case. He carries himself with a bow to Ganimard as to a colleague, yet answers questions with disarming humility, insisting he knows nothing while quietly producing the one precise point everyone else missed. His gift is deduction stripped of extraneous comment, and it is this that turns a baffling burglary into a thread leading toward the Hollow Needle.

See Isidore Beautrelet in The Shot Book page

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Character Web

25 connections

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

Relationship types

Rivalry
Professional
Social
Other

Character groups

Protagonist
Primary Investigation Circle

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Narrative arc

Story tension across the book — this chapter sits in Exposition.

Setup
Breaking point
Aftermath
Closing

Isidore reaches his emotional and psychological nadir here, having been utterly defeated and humiliated by Lup…

Full beat labels and climax notes unlock in the reader.

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Relationships

Arsène Lupin
rivalry · ambivalent
A brilliant cat-and-mouse game where Lupin respects Beautrelet's intellect as his most… How this plays out →
M. Filleul
professional · positive
M. Massiban
professional · positive
Mme. de Villemon
social · ambivalent
Comte de Gesvres
professional · positive
Raymonde de Saint-Véran
friendship · positive
Mlle. de Saint-Véran
social · ambivalent
Froberval
professional · positive
Baron Anfredi
rivalry · negative
M. Brédoux
professional · positive
Holmlock Shears
friendship · positive
M. Filleul
professional · positive

Arsène Lupin
A brilliant cat-and-mouse game where Lupin respects Beautrelet's intellect as his most formidable adversary.
M. Filleul
Beautrelet assists the local magistrate Filleul in the investigation of Lupin's crimes.
M. Massiban
Massiban, an archivist, collaborates with Beautrelet by providing historical clues about the Hollow Needle.
Mme. de Villemon
Beautrelet interacts with Mme. de Villemon during the investigation, treating her as a witness and suspect.
Comte de Gesvres
The Comte de Gesvres, as a victim of Lupin's theft, cooperates with Beautrelet in the investigation.
Raymonde de Saint-Véran
Beautrelet develops a friendly rapport with Raymonde, protecting her from Lupin's schemes.
Mlle. de Saint-Véran
Beautrelet encounters Mlle. de Saint-Véran as a member of the household involved in the mystery.
Froberval
Froberval, a local guide, assists Beautrelet in navigating the terrain around the Hollow Needle.
Baron Anfredi
Baron Anfredi, a disguised Lupin, competes directly with Beautrelet in the hunt for the secret.
M. Brédoux
M. Brédoux, a police officer, works with Beautrelet on the case.
Holmlock Shears
Shears and Beautrelet share mutual respect and collaborate as fellow detectives against Lupin.
M. Filleul
Beautrelet assists the local magistrate Filleul in the investigation of Lupin's crimes.

Relationship notes

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

See Isidore Beautrelet in II: Isidore Beautrelet, Sixth-Form Schoolboy

In the story

Isidore Beautrelet appears across 10 companion beats. Open any chapter in the free preview to see the notes beside the text.

The Shot
A young student disguised as a reporter; claims to know the murderer's name and the stolen objects.
II: Isidore Beautrelet, Sixth-Form Schoolboy
The sixth-form schoolboy detective; travels to Dieppe, receives a threat, examines the crime scene, and later is captured and released by the magistrate.
The Corpse
Reveals the chapel statues are plaster casts, deduces the crypt's existence, and leads the descent.
IV: Face to Face
Recovering from his wound, he confronts Lupin and reveals his plan to publish the truth about Lupin's survival.
On the Track
The young detective, stunned by his father's kidnapping, travels to Cherbourg and begins investigating, following Gaffer Charel and a mysterious watcher.
VI: An Historic Secret
Weeps in humiliation after reading Lupin's letter revealing the historic secret and his own defeat.
VII: The Treatise of the Needle
Resolves to continue his war against Lupin; investigates the murder of the captain of the guards and traces the Larbeyrie lineage; discovers Marie Antoinette's book of hours and the double signature.
From Caesar to Lupin
Deduces that the secret of the Hollow Needle is tied to Normandy and the Cauchois triangle; retraces Lupin's steps along the Seine.
IX: Open, Sesame!
Discovers the secret of the Hollow Needle, locates the hidden entrance, and observes Lupin's men moving goods. Plans the assault with Ganimard, though he fears Lupin may have already escaped.
X: The Treasures of the Kings of France
Brought to the Needle, he is stunned to discover that Valméras is Lupin; he witnesses the treasure and Lupin's farewell.

Chapter companion notes

Spoil-light check-ins for Isidore Beautrelet unlock in the free preview.

See Isidore Beautrelet in II: Isidore Beautrelet, Sixth-Form Schoolboy

See Isidore Beautrelet in The Shot