“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 say 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.