Prelice nodded in silence, and Madame Marie, drawing aside a portion of the black hangings, revealed a small recess. From this she took some purple leaves, and moving towards the tripod, threw them on the perfumed fire. "Lie down on your face," she commended, "else the fumes will send you into a trance. Quick! The smoke rises." It certainly did, in a thick white cloud. Madame Marie stood over it, letting the odour flow into her nostrils. Not wishing to experience the power of the herb, as he had witnessed its results before, Prelice lay full length on the red carpet. The smoke was circling so high up that he could not breathe it, although a sickly whiff of tuberose perfume came to his nostrils. Perhaps the draught sweeping from under the door neutralised the powerful scent at this lower level; but be this as it may, Prelice lay perfectly flat, and, as in a dream, heard Madame Marie speak after the manner of the tranced in an unemotional voice, and very distinctly. "I leave this room," she said in her mellow tones. "I rise high. I pass across London; the streets are under me. I see the Park, and now I poise above Alexander Mansions. I sink; I pass through the roof; I am in Mrs. Rover's flat." "Search for the dress," commanded Prelice softly. There was a pause, and then the calm voice sounded again. "I search in Mrs. Rover's room. The dress she wore is there in a wardrobe together with a green domino." "Search for another dress," said Prelice, risking the chance; "another dress of the same style." Again there came a pause. "I am searching!" said the voice, and a silence ensued. For quite two minutes it endured; then Madame spoke again, still with the same awful calmness. "A man's dressing-room--in the flat across the landing. I see a cupboard, in which many clothes are hanging up. Men's clothes they are. Behind them is a green domino with a scarlet-embroidered dress sewn to it." "Who wore it?" asked Prelice, his heart beating. "I cannot tell. It is not permitted by the Powers." Then came a long silence. CHAPTER XIX. CIRCUMSTANTIAL EVIDENCE. It was with extraordinary feelings that Lord Prelice emerged from that mystic room into the everyday world of Bond Street. After the refusal to declare the name of the person who had worn the dress Madame Marie had become silent, and Prelice raised his head, to see her standing rigid and white between the painted windows. The white smoke had disappeared into thin air, and save that the strong tuberose scent still lingered behind, there was nothing to show what had placed her in the trance. Obedient to instructions, the young man left the still figure in the lonely room, and passed through the outer apartment on his way down the stairs. The boy, cross-legged in the corner, looked up anxiously as he went out. "You have said nothing?" he breathed apprehensively.