If she heard him she gave no sign. Mental torture had exhausted her emotion. She never raised her head as he guided her to the staircase; her eyes stared only at his open right hand. The house was dark except for the hall light burning dimly, when Winslow Whitney inserted his latchkey and entered the front door. Removing hat and overcoat, he made his way noiselessly to his studio in the attic. With cautious movement he fingered the locks on his door. Would Miller's plan for catching Spencer's murderer work out? According to their arrangement he had left the door insecurely fastened. Just as he was about to creep into the room, he heard distinctly in the stillness a whispered word in a voice his keen ear instantly recognized. All idea of caution forgotten, he threw open the door and switched on the electric light. To outward appearances the room was empty. Darting over to where he kept his secret papers, he lifted a powerful Mazda lamp, the better to scan the prepared paper left where an incautious thief would be obliged to rest his hand with some degree of force. Under the powerful light the finger prints stood out distinct and clear. But with eyes starting from his head, Whitney paused to snatch up a magnifying glass, and by its aid examined the finger prints minutely. "It's--his--finger print--but the voice, my God! the voice.... Kathleen, Kathleen!" A gurgle choked his utterance, and the magnifying glass clattered beside him as he fell inertly on the floor. CHAPTER XXII "TRENTON HURRY" Charles Miller, completing a hurried toilet, paused at the sound of a sharp rap on his bedroom door. "Come in," he called. "Ah, Henry, good morning," as the chauffeur stepped briskly over the threshold. The latter's white face and agitated manner indicated that he was the bearer of portentous news. Miller made a hasty step in his direction. "Kathleen--is she ill?" he asked. The chauffeur looked to see that the bedroom door was securely fastened before he answered. "It isn't Miss Kathleen," he answered cautiously. "Mr. Whitney has had a stroke." "What?" Miller recoiled. "When?" "Some time last night." "Will he recover?" "Dr. McLane says that he cannot tell yet, Herr Captain. He was alive but still unconscious when I left the house to come here." "What"--Miller looked anxiously at the chauffeur--"what brought on the stroke? Mr. Whitney appeared to be in robust health when I saw him last." "The Doctor seemed to think it was caused by sudden shock, Herr Captain." Henry stepped closer. "Miss Kiametia Grey found Mr. Whitney in his studio lying on the floor unconscious." "Miss Grey found him!" Miller's eyes opened wide in astonishment. "Yes, Herr Captain; at four o'clock in the morning," with significant emphasis, and the two men looked at each other. "And what was Miss Grey doing in the attic at that hour of the morning?" "She said she had gone upstairs to see Rosa, the cook, who was suffering from a bilious attack early in the evening."