"I now made one mistake. I was not satisfied with the evidence I had obtained. I wished to see the man's face. Had I refrained from this, the second terrible attack would not have occurred."
"But," asked the President, "why should Larsan go to Mademoiselle Stangerson's room, at all? Why should he twice attempt to murder her?"
"Because he loves her, Monsieur President."
"That is certainly a reason, but–"
"It is the only reason. He was madly in love, and because of that, and—other things, he was capable of committing any crime."
"Did Mademoiselle Stangerson know this?"
"Yes, Monsieur; but she was ignorant of the fact that the man who was pursuing her was Frederic Larsan, otherwise, of course, he would not have been allowed to be at the chateau. I noticed, when he was in her room after the incident in the gallery, that he kept himself in the shadow, and that he kept his head bent down. He was looking for the lost eye–glasses. Mademoiselle Stangerson knew Larsan under another name."
"Monsieur Darzac," asked the President, "did Mademoiselle Stangerson in any way confide in you on this matter? How is it that she has never spoken about it to anyone? If you are innocent, she would have wished to spare you the pain of being accused."
"Mademoiselle Stangerson told me nothing," replied Monsieur Darzac.
"Does what this young man says appear probable to you?" the President asked.
"Mademoiselle Stangerson has told me nothing," he replied stolidly.
"How do you explain that, on the night of the murder of the keeper," the President asked, turning to Rouletabille, "the murderer brought back the papers stolen from Monsieur Stangerson?—How do you explain how the murderer gained entrance into Mademoiselle Stangerson's locked room?"
"The last question is easily answered. A man like Larsan, or Ballmeyer, could have had made duplicate keys. As to the documents, I think Larsan had not intended to steal them, at first. Closely watching Mademoiselle with the purpose of preventing her marriage with Monsieur Robert Darzac, he one day followed her and Monsieur into the Grands Magasins de la Louvre. There he got possession of the reticule which she lost, or left behind. In that reticule was a key with a brass head. He did not know there was any value attached to the key till the advertisement in the newspapers revealed it. He then wrote to Mademoiselle, as the advertisement requested. No doubt he asked for a meeting, making known to her that he was also the person who had for some time pursued her with his love. He received no answer. He went to the Post Office and ascertained that his letter was no longer there. He had already taken complete stock of Monsieur Darzac, and, having decided to go to any lengths to gain Mademoiselle Stangerson, he had planned that, whatever might happen, Monsieur Darzac, his hated rival, should be the man to be suspected.
"I do not think that Larsan had as yet thought of murdering Mademoiselle Stangerson; but whatever he might do, he made sure that Monsieur Darzac should suffer for it. He was very nearly of the same height as Monsieur Darzac and had almost the same sized feet. It would not be difficult, to take an impression of Monsieur Darzac's footprints, and have similar boots made for himself. Such tricks were mere child's play for Larsan, or Ballmeyer.
"Receiving no reply to his letter, he determined, since Mademoiselle Stangerson would not come to him, that he would go to her. His plan had long been formed. He had made himself master of the plans of the chateau and the pavilion. So that, one afternoon, while Monsieur and Mademoiselle Stangerson were out for a walk, and while Daddy Jacques was away, he entered the latter by the vestibule window. He was alone, and, being in no hurry, he began examining the furniture. One of the pieces, resembling a safe, had a very small keyhole. That interested him! He had with him the little key with the brass head, and, associating one with the other, he tried the key in the lock. The door opened. He saw nothing but papers. They must be very valuable to have been put away in a safe, and the key to which to be of so much importance. Perhaps a thought of blackmail occurred to him as a useful possibility in helping him in his designs on Mademoiselle Stangerson. He quickly made a parcel of the papers and took it to the lavatory in the vestibule. Between the time of his first examination of the pavilion and the night of the murder of the keeper, Larsan had had time to find out what those papers contained. He could do nothing with them, and they were rather compromising. That night he took them back to the chateau. Perhaps he hoped that, by returning the papers he might obtain some gratitude from Mademoiselle Stangerson. But whatever may have been his reasons, he took the papers back and so rid himself of an encumbrance."
Rouletabille coughed. It was evident to me that he was embarrassed. He had arrived at a point where he had to keep back his knowledge of Larsan's true motive. The explanation he had given had evidently been unsatisfactory. Rouletabille was quick enough to note the bad impression he had made, for, turning to the President, he said: "And now we come to the explanation of the Mystery of The Yellow Room!"
A movement of chairs in the court with a rustling of dresses and an energetic whispering of "Hush!" showed the curiosity that had been aroused.
"It seems to me," said the President, "that the Mystery of The Yellow Room, Monsieur Rouletabille, is wholly explained by your hypothesis. Frederic Larsan is the explanation. We have merely to substitute him for Monsieur Robert Darzac. Evidently the door of The Yellow Room was open at the time Monsieur Stangerson was alone, and that he allowed the man who was coming out of his daughter's chamber to pass without arresting him—perhaps at her entreaty to avoid all scandal."
"No, Monsieur President," protested the young man. "You forget that, stunned by the attack made on her, Mademoiselle Stangerson was not in a condition to have made such an appeal. Nor could she have locked and bolted herself in her room. You must also remember that Monsieur Stangerson has sworn that the door was not open."
"That, however, is the only way in which it can be explained. The Yellow Room was as closely shut as an iron safe. To use your own expression, it was impossible for the murderer to make his escape either naturally or supernaturally. When the room was broken into he was not there! He must, therefore, have escaped."
"That does not follow."
"What do you mean?"
"There was no need for him to escape—if he was not there!"
"Not there!"
"Evidently, not. He could not have been there, if he were not found there."
"But, what about the evidences of his presence?" asked the President.
"That, Monsieur President, is where we have taken hold of the wrong end. From the time Mademoiselle Stangerson shut herself in the room to the time her door was burst open, it was impossible for the murderer to escape. He was not found because he was not there during that time."
"But the evidences?"
"They have led us astray. In reasoning on this mystery we must not take them to mean what they apparently mean. Why do we conclude the murderer was there?—Because he left his tracks in the room? Good! But may he not have been there before the room was locked. Nay, he must have been there before! Let us look into the matter of these traces and see if they do not point to my conclusion.
"After the publication of the article in the 'Matin' and my conversation with the examining magistrate on the journey from Paris to Epinaysur–Orge, I was certain that The Yellow Room had been hermetically sealed, so to speak, and that consequently the murderer had escaped before Mademoiselle Stangerson had gone into her chamber at midnight.