The other window, facing on the court, was raised a few inches, just as Mrs. Morton had left it half an hour before. Duvall turned to his companion with a puzzled frown. "I had supposed, Mr. Baker," he said, "that someone had entered this room, and frightened Miss Morton while she was asleep, but that is impossible. The windows have not been disturbed." Baker glanced at the one which faced the court. "That one may have been," he said, indicating it with a nod. "Someone may have come in that way, raising the window to effect an entrance, and lowering it again after leaving." "I admit that what you say would be possible, were there any way in which the window might be reached from outside," Duvall replied, "but if you will look out, and tell me how anyone could make an entrance from the court, I will agree to the possibility you suggest." Baker raised the window, and glanced out. "The apartment above," Duvall went on, "is unoccupied, and the window above is closed and fastened. The little attic in the adjoining house is unused, although that is not important, since no one could reach this window from it, in any event. Can you suggest any other way?" Mr. Baker shook his head. "She must have been frightened by some terrible nightmare," he said. "I do not wonder at it. She has gone through enough to upset anybody's nerves. Suppose we go back and question her." "Just a moment," exclaimed Duvall. Then he dropped upon his knees beside the disordered bed, and began to examine the surface of the counterpane with minute care. "What is it?" Baker asked, joining him. "I don't know--yet," returned Duvall, as he took a magnifying glass from his pocket and proceeded to scrutinize with the greatest interest some marks upon the counterpane's surface. Presently he rose, replaced the glass in his pocket, and turned to his companion. "There is something very astonishing about this whole affair," he exclaimed. "What do you make of those?" He indicated a series of dark smudges upon the bedspread, arranged in little groups. Baker bent over and examined the marks with an exclamation of surprise. "Why--they look like finger prints," he cried. "Large finger prints." "It is impossible to say whether they are finger prints or not," Duvall replied. "As you see, there are a great many of them, very confusingly arranged. But there is something else, that you have not noticed. What do you suppose could have made a mark like this?" He pointed to a long straight dark line, which extended half way across the counterpane, and pointed directly toward the window which faced upon the court. The line was very faint, but clearly defined, as though someone had laid a thin dusty stick across the bed. "I can't make anything of it," Baker exclaimed, gazing toward the window.