M. Bex opened a door to the left of the hall, and we passed in. M. Hautet and his clerk were sitting at a big round table. They looked up as we entered. The commissary introduced us, and explained our presence.
M. Hautet, the Juge d’Instruction, was a tall, gaunt man, with piercing dark eyes, and a neatly cut grey beard, which he had a habit of caressing as he talked. Standing by the mantelpiece was an elderly man, with slightly stooping shoulders, who was introduced to us as Dr. Durand.
“Most extraordinary,” remarked M. Hautet, as the commissary finished speaking. “You have the letter here, monsieur?”
Poirot handed it to him, and the magistrate read it.
“H’m. He speaks of a secret. What a pity he was not more explicit. We are much indebted to you, M. Poirot. I hope you will do us the honour of assisting us in our investigations. Or are you obliged to return to London?”
“M. le juge, I propose to remain. I did not arrive in time to prevent my client’s death, but I feel myself bound in honour to discover the assassin.”
The magistrate bowed.
“These sentiments do you honour. Also, without doubt, Madame Renauld will wish to retain your services. We are expecting M. Giraud from the Sûreté in Paris any moment, and I am sure that you and he will be able to give each other mutual assistance in your investigations. In the meantime, I hope that you will do me the honour to be present at my interrogations, and I need hardly say that if there is any assistance you require it is at your disposal.”
“I thank you, monsieur. You will comprehend that at present I am completely in the dark. I know nothing whatever.”
M. Hautet nodded to the commissary, and the latter took up the tale:
“This morning, the old servant Françoise, on descen-
