"Rose Montalbon was murdered in New York some months ago. I believe that I am on the track of the guilty man. Will you aid me?" "That depends upon circumstances. You say the woman is dead. That alters my position in this matter very much. I had reasons, good ones to me, for refusing to converse with you on this subject. But if the woman is dead, the objections vanish." Mr. Barnes thought he understood. Here was one of those who had been ruled by fear, as Chambers had said. "What I want from you, Mr. Neuilly, is very simple. You either can or you cannot give me the information that I wish. Did you know a man named Leroy Mitchel who was at one time this woman's husband?" "I knew him very well. He was a scoundrel of the deepest dye, for all that he had the manners of the polished gentleman." "Do you know what became of him?" "No; he left this city suddenly and has never returned." "Did you know little Rose Mitchel?" "Many a time has she sat upon my knee. This man was her father. He wronged one of the sweetest little girls that ever lived." "You knew this girl? Knew her name?" "I did." "What was it?" "That is a secret I have guarded for too many years to be willing to yield it now to a stranger. You must show me good reasons for giving it to you before I tell it." "I will explain. This man Mitchel is now in New York. He is about to marry a sweet, good woman. Yet I think that he murdered Rose Montalbon, or Mitchel, to get her out of his way. I think that she was blackmailing him. Besides, he has his child with him." Mr. Neuilly started up and paced the room for some time, much agitated. Finally he stopped and said: "You say he has the child with him?" "Yes. Here is her likeness." He handed Mr. Neuilly the photograph made by Lucette. Mr. Neuilly looked at it, muttered "very like! very like!" then remained silent for some moments; finally he said: "And you think he murdered this woman, Montalbon?" "I do." "It would be terrible to hang that child's father. What dishonor! What dishonor! But Justice is Justice!" He seemed to be talking rather to himself than to Mr. Barnes. Suddenly he turned and said: "I cannot tell you the name for which you ask. But I will go with you to New York, and if this story of yours is true, I will move heaven and earth to see justice done. That villain must not ruin another young life." "Good," exclaimed the detective, delighted with the result of his visit. "One more point, Mr. Neuilly. What do you know of the existence of another Mr. Leroy Mitchel?" "I never met him, though I knew of him. There was a mystery about that, which I never could unravel. I think that he loved this same girl. At any rate shortly after she died, he lost his reason, and is now in an insane asylum. Of course he cannot help us." Mr. Barnes, after arranging where to meet Mr. Neuilly, returned to the St. Charles to make his own preparations for going north. Up in his room he found Chambers awaiting him.