that the revolver was used by Mademoiselle Stangerson against the assassin. Now, what weapon did the murderer use? The blow on the temple seems to show that the murderer wished to stun Mademoiselle Stangerson,—after he had unsuccessfully tried to strangle her. He must have known that the attic was inhabited by Daddy Jacques, and that was one of the reasons, I think, why he must have used a quiet weapon,—a life-preserver, or a hammer."
"All that doesn't explain how the murderer got out of 'The Yellow Room,'" I observed.
"Evidently," replied Rouletabille, rising, "and that is what has to be explained. I am going to the Château du Glandier, and have come to see whether you will go with me."
"I?"—
"Yes, my boy. I want you. The 'Epoque' has definitely entrusted this case to me, and I must clear it up as quickly as possible."
"But in what way can I be of any use to you?"
"Monsieur Robert Darzac is at the Château du Glandier."
"That's true. His despair must be boundless."
"I must have a talk with him."
Rouletabille said it in a tone that surprised me.
"Is it because—you think there is something to be got out of him?" I asked.
"Yes."
That was all he would say. He retired to my sitting-room, begging me to dress quickly.
I knew Monsieur Robert Darzac from having been of great service to him in a civil action, while
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