“I am an amateur photographer,” was the reply. “I work in the office at the top of the building just across the Street from the hotel. Yesterday I got hold of some new plates that a friend had advised me to use, but I had no time to try them till this afternoon.” “And you tried them on this scene?” asked Nick, quickly. “Without meaning to, yes. You see, I knew it would be Sunday before I would have time to take any pictures that I cared about, but I wanted to be sure that the plates were all right. “So, when there was a dull time in the office work, I got out my camera, which I had with me, and went to the window. “There isn’t much of a view from here, but I thought I’d take a couple of shots at the roofs, just to test the plates. “I had the camera all ready, when I accidentally touched the button. “That made me hot, for I had spoiled a plate. “I pointed it carefully from the best view I could get from there, and tried again. “Just as I pushed the button, I heard cries on the street, and, looking down, saw a man lying on the sidewalk, and several others running toward him. “Of course, I went down to see what was the matter. “It was Mr. Judson. “Later I went back, and as soon as possible after supper, while there was yet sunlight, I developed my second plate. “I didn’t bring that with me, for it wouldn’t interest you. But it came out so good that I thought I might as well see what I had caught on the first plate, when the thing went off before I knew. “That picture in your hand was what I caught.” He paused, but Nick said nothing, and the young man added: “I had heard your name mentioned in connection with the matter, and, as people said it was a case of suicide, I thought I ought to show you what I had caught.” Nick drew a long breath. “Well!” he said, “for once the brass band has been useful. I wanted to work unknown, but the fact that I am known to be on the case has brought me a piece of evidence that otherwise I might never have discovered.” Again he looked at the picture. “This lets Low out of it,” he murmured. Kerr’s theory was that Low had made a mad rush for the clergyman as soon as he entered the room, pushed him from the window, and then hurried out and down the stairs. The amateur photograph showed not only the unfortunate clergyman falling headforemost toward the sidewalk, but above him the forms of two men at the window. They were not looking out, but rather in the act of dodging back. These two were outlined very dimly, but the picture was clear enough to show that there were two of them, and that their arms were half-raised, as would be natural if they had just thrown a body away from them. Unluckily, the faces were not at all distinct. Try as he would, and Nick used his magnifying glass, he could not make them out to his satisfaction. While he was still studying it, there came a knock at the door, and Patsy hurried in. “The clerk told me you were here?” he said. “Well?”