"But all the windows of the suite were shut; and it was ascertained, after the crime, that they were still shut."

"All except one, the secretary's window, Chapman's, which was only pushed to. I tried it myself."

This time the prime minister seemed a little shaken, so logical did M.

Lenormand's version seem, so precise and supported by such sound facts.

He asked, with growing interest:

"But what was the man's object in coming?"

"I don't know."

"Ah, you don't know!"

"Any more than I know his name."

"But why did he kill Mr. Kesselbach?"

"I don't know. This all remains a mystery. The utmost that we have the right to suppose is that he did not come with the intention of killing, but with the intention, he too, of taking the documents contained in the morocco note-case and the ebony box; and that, finding himself by accident in the presence of the enemy reduced to a state of helplessness, he killed him."

Valenglay muttered:

"Yes, strictly speaking, that is possible... . And, according to you, did he find the documents?"

"He did not find the box, because it was not there; but he found the black morocco note-case. So that Lupin and ... the other are in the same position. Each knows as much as the other about the Kesselbach scheme."

"That means," remarked the premier, "that they will fight."

"Exactly. And the fight has already begun. The murderer, finding a card of Arsene Lupin's, pinned it to the corpse. All the appearances would thus be against Arsene Lupin ... therefore, Arsene Lupin would be the murderer."

"True ... true," said Valenglay. "The calculation seemed pretty accurate."

"And the stratagem would have succeeded," continued M. Lenormand, "if in consequence of another and a less favorable accident, the murderer had not, either in coming or going, dropped his cigarette-case in room 420, and if the floor-waiter, Gustave Beudot, had not picked it up. From that moment, knowing himself to be discovered, or on the point of being discovered ..."

"How did he know it?"

"How? Why, through M. Formerie, the examining-magistrate, himself! The investigation took place with open doors. It is certain that the murderer was concealed among the people, members of the hotel staff and journalists, who were present when Gustave Beudot was giving his evidence; and when the magistrate sent Gustave Beudot to his attic to fetch the cigarette-case, the man followed and struck the blow. Second victim!"

No one protested now. The tragedy was being reconstructed before their eyes with a realism and a probable accuracy which were equally striking.

"And the third victim?" asked Valenglay.

"He himself gave the ruffian his opportunity. When Beudot did not return, Chapman, curious to see the cigarette-case for himself, went upstairs with the manager of the hotel. He was surprised by the murderer, dragged away by him, taken to one of the bedrooms and murdered in his turn."

"But why did he allow himself to be dragged away like that and to be led by a man whom he knew to be the murderer of Mr. Kesselbach and of Gustave Beudot?"

"I don't know, any more than I know the room in which the crime was committed, or the really miraculous way in which the criminal escaped."

"Something has been said about two blue labels."

"Yes, one was found on the box which Lupin sent back; and the other was found by me and doubtless came from the morocco note-case stolen by the murderer."

"Well?"

"I don't think that they mean anything. What does mean something is the number 813, which Mr. Kesselbach wrote on each of them. His handwriting has been recognized."

"And that number 813?"

"It's a mystery."

"Then?"

"I can only reply again that I don't know."

"Have you no suspicions?"

"None at all. Two of my men are occupying one of the rooms in the Palace Hotel, on the floor where Chapman's body was found. I have had all the people in the hotel watched by these two men. The criminal is not one of those who have left."

"Did no one telephone while the murders were being committed?"

"Yes, some one telephoned from the outside to Major Parbury, one of the four persons who occupied rooms on the first-floor passage."

"And this Major Parbury?"

"I am having him watched by my men. So far, nothing has been discovered against him."

"And in which direction do you intend to seek?"

"Oh, in a very limited direction. In my opinion, the murderer must be numbered among the friends or connections of Mr. and Mrs. Kesselbach. He followed their scent, knew their habits, the reason of Mr. Kesselbach's presence in Paris; and he at least suspected the importance of Mr.

Kesselbach's plans."

"Then he was not a professional criminal?"

"No, no, certainly not! The murder was committed with extraordinary cleverness and daring, but it was due to circumstances. I repeat, we shall have to look among the people forming the immediate circle of Mr.

and Mrs. Kesselbach. And the proof is that Mr. Kesselbach's murderer killed Gustave Beudot for the sole reason that the waiter had the cigarette-case in his possession; and Chapman for the sole reason that the secretary knew of its existence. Remember Chapman's excitement: at the mere description of the cigarette-case, Chapman received a sudden insight into the tragedy. If he had seen the cigarette-case, we should have been fully informed. The man, whoever he may be, was well aware of that: and he put an end to Chapman. And we know nothing, nothing but the initials L and M."

He reflected for a moment and said:

"There is another proof, which forms an answer to one of your questions, Monsieur le President: Do you believe that Chapman would have accompanied that man along the passages and staircases of the hotel if he did not already know him?"

The facts were accumulating. The truth or, at least, the probable truth was gaining strength. Many of the points at issue, the most interesting, perhaps, remained obscure. But what a light had been thrown upon the subject! Short of the motives that inspired them, how clearly Lenormand's hearers now perceived the sequence of acts performed on that tragic morning!

There was a pause. Every one was thinking, seeking for arguments, for objections. At last, Valenglay exclaimed:

"My dear Lenormand, this is all quite excellent. You have convinced me.

... But, taking one thing with another, we are no further than we were."

"What do you mean?"