le vénérable vieillard

Examiner

Ferdinand Albaret

Director

(uncredited)

Mr. Guérin

Duke of Bocanegra Sr.

Béranger

Agent (uncredited)

Emile

Le philatéliste

Le deuxième commanditaire

Mathurin

(uncredited)

Doctor

Antoine

Valet (uncredited)

Doctor

Le médecin légiste

Employee

Professor Georges Limousin (uncredited)

Notary (uncredited)

Le mage

The domestic

Man at Rouletabille's party (uncredited)

Professor Peccavi

Examiner (uncredited)

Chemist

Un docteur du train (uncredited)

Member of the circle

(uncredited)

M. de Montesson

Albert, le concierge (uncredited)

Licaire

Un locataire

Le procureur

Comte de Larnac

Professor

Maître Ménager, le notaire

L'instituteur

Berthier

Professor

Official (uncredited)

Un docteur

Un médecin

Un diplomate (uncredited)