“But the third evidence puzzled me altogether. Having placed Larsan at the end of the ‘off-turning gallery,’ I could not explain how he had taken advantage of the moment when I had gone to the left wing of the château to find Monsieur Stangerson and Daddy Jacques, to return to Mademoiselle Stangerson’s room. It was a very dangerous thing to do. He risked being captured,—and he knew it. And he was very nearly captured. He had not had time to regain his post, as he had certainly hoped to do. He had then a very strong reason for returning to his room. As for myself, when I sent Daddy Jacques to the end of the ‘right gallery,’ I naturally thought that Larsan was still at his post. Daddy Jacques, in going to his post, had not looked, when he passed, to see whether Larsan was at _his_ post or not. “What, then, was the urgent reason which had compelled Larsan to go to the room a second time? I guessed it to be some evidence of his presence there. He had left something very important in that room. What was it? And had he recovered it? I begged Madame Bernier who was accustomed to clean the room to look, and she found a pair of eye-glasses—this pair, Monsieur President!” And Rouletabille drew the eye-glasses, of which we know, from his pocket. “When I saw these eye-glasses,” he continued, “I was utterly nonplussed. I had never seen Larsan wear eye-glasses. What did they mean? Suddenly I exclaimed to myself: ‘I wonder if he is long-sighted?’ I had never seen Larsan write. He might, then, be _long-sighted_. They would certainly know at the Sûreté, and also know if the glasses were his. Such evidence would be damning. That explained Larsan’s return. I know now that Larsan, or Ballmeyer, is long-sighted and that these glasses belonged to him. “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 Frédéric Larsan, otherwise, of course, he would not have been allowed to be at the château. 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.”