“Mademoiselle Stangerson appeared at the door of her ante-room,” continues Rouletabille’s note-book. “We were near her door in the gallery where this incredible phenomenon had taken place. There are moments when one feels as if one’s brain were about to burst. A bullet in the head, a fracture of the skull, the seat of reason shattered—with only these can I compare the sensation which exhausted and left me void of sense.

“Happily, Mademoiselle Stangerson appeared on the threshold of her ante-room. I saw her, and that helped to relieve my chaotic state of mind. I breathed her—I inhaled the perfume of the lady in black, whom I should never see again. I would have given ten years of my life—half my life—to see once more the lady in black! Alas! I no more meet her but from time to time,—and yet!—and yet! how the memory of that perfume—felt by me alone—carries me back to the days of my childhood.* It was this sharp reminder from my beloved perfume, of the lady in black, which made me go to her—dressed wholly in white and so pale—so pale and so beautiful!—on the threshold of the inexplicable gallery. Her beautiful golden hair, gathered into a knot on the back of her neck, left visible the red star on her temple which had so nearly been the cause of her death. When I first got on the right track of the mystery of this case I had imagined that, on the night of the tragedy in The Yellow Room, Mademoiselle Stangerson had worn her hair in bands. But then, how could I have imagined otherwise when I had not been in The Yellow Room!

* When I wrote these lines, Joseph Rouletabille was eighteen years of age,—and he spoke of his “youth.” I have kept the text of my friend, but I inform the reader here that the episode of the mystery of The Yellow Room has no connection with that of the perfume of the lady in black. It is not my fault if, in the document which I have cited, Rouletabille thought fit to refer to his childhood.

“But now, since the occurrence of the inexplicable gallery, I did not reason at all. I stood there, stupid, before the apparition—so pale and so beautiful—of Mademoiselle Stangerson. She was clad in a dressing-gown of dreamy white. One might have taken her to be a ghost—a lovely phantom. Her father took her in his arms and kissed her passionately, as if he had recovered her after being long lost to him. I dared not question her. He drew her into the room and we followed them,—for we had to know!—The door of the boudoir was open. The terrified faces of the two nurses craned towards us. Mademoiselle Stangerson inquired the meaning of all the disturbance. That she was not in her own room was quite easily explained—quite easily. She had a fancy not to sleep that night in her chamber, but in the boudoir with her nurses, locking the door on them. Since the night of the crime she had experienced feelings of terror, and fears came over her that are easily to be comprehended.

“But who could imagine that on that particular night when he was to come, she would, by a mere chance, determine to shut herself in with her women? Who would think that she would act contrary to her father’s wish to sleep in the drawing-room? Who could believe that the letter which had so recently been on the table in her room would no longer be there? He who could understand all this, would have to assume that Mademoiselle Stangerson knew that the murderer was coming—she could not prevent his coming again—unknown to her father, unknown to all but to Monsieur Robert Darzac. For he must know it now—perhaps he had known it before! Did he remember that phrase in the Elysee garden: ‘Must I commit a crime, then, to win you?’ Against whom the crime, if not against the obstacle, against the murderer? ‘Ah, I would kill him with my own hand!’ And I replied, ‘You have not answered my question.’ That was the very truth. In truth, in truth, Monsieur Darzac knew the murderer so well that—while wishing to kill him himself—he was afraid I should find him. There could be but two reasons why he had assisted me in my investigation. First, because I forced him to do it; and, second, because she would be the better protected.

“I am in the chamber—her room. I look at her, also at the place where the letter had just now been. She has possessed herself of it; it was evidently intended for her—evidently. How she trembles!—Trembles at the strange story her father is telling her, of the presence of the murderer in her chamber, and of the pursuit. But it is plainly to be seen that she is not wholly satisfied by the assurance given her until she had been told that the murderer, by some incomprehensible means, had been able to elude us.

“Then follows a silence. What a silence! We are all there—looking at her—her father, Larsan, Daddy Jacques and I. What were we all thinking of in the silence? After the events of that night, of the mystery of the inexplicable gallery, of the prodigious fact of the presence of the murderer in her room, it seemed to me that all our thoughts might have been translated into the words which were addressed to her. ‘You who know of this mystery, explain it to us, and we shall perhaps be able to save you. How I longed to save her—for herself, and, from the other!—It brought the tears to my eyes.

“She is there, shedding about her the perfume of the lady in black. At last, I see her, in the silence of her chamber. Since the fatal hour of the mystery of The Yellow Room, we have hung about this invisible and silent woman to learn what she knows. Our desires, our wish to know must be a torment to her. Who can tell that, should we learn the secret of her mystery, it would not precipitate a tragedy more terrible than that which had already been enacted here? Who can tell if it might not mean her death? Yet it had brought her close to death,—and we still knew nothing. Or, rather, there are some of us who know nothing. But I—if I knew who, I should know all. Who?—Who?—Not knowing who, I must remain silent, out of pity for her. For there is no doubt that she knows how he escaped from The Yellow Room, and yet she keeps the secret. When I know who, I will speak to him—to him!”

“She looked at us now—with a far-away look in her eyes—as if we were not in the chamber. Monsieur Stangerson broke the silence. He declared that, henceforth, he would no more absent himself from his daughter’s apartments. She tried to oppose him in vain. He adhered firmly to his purpose. He would install himself there this very night, he said. Solely concerned for the health of his daughter, he reproached her for having left her bed. Then he suddenly began talking to her as if she were a little child. He smiled at her and seemed not to know either what he said or what he did. The illustrious professor had lost his head. Mademoiselle Stangerson in a tone of tender distress said: ‘Father!—father!’ Daddy Jacques blows his nose, and Frederic Larsan himself is obliged to turn away to hide his emotion. For myself, I am able neither to think or feel. I felt an infinite contempt for myself.

“It ............