landing on each of the three stories above the ground floor. He mentioned the four rooms, one on each floor, and the locked door which led to each room from the staircase. He said that it was one of his duties to visit the Tower from time to time, to see if repairs were needed, and to make sure that no tramps had broken in. Seven years before, when he first came to the Home Farm, the Tower had been left unlocked, as there was nothing of value in it; but it was discovered that tramps were sleeping there, and since those days, keys had been made. Barnard was in the habit of inspecting the Tower once every month or six weeks, and had made his last call only ten or twelve days before the murder. Everything had been right then, the doors locked, and no sign that any one had been inside. On the day of the murder, when he was summoned to go to Sir Ian, he had seen the door of the room on the ground floor standing open. At first he had not thought of examining the lock, but later he had done so, and found that it was unbroken. Therefore a key which fitted it must have been used, by whom he could not guess. He knew only that his own key was at the farm, in its usual place. He would not swear that his key might not have been, at some time or other, taken from that place, and copied; but if so, he had no idea when, or by whom. He did not know any one who might have wished, for any reason whatever, to get into the Tower. There was very little
