"I account for its being there in this way," I argued. "The room was dark; for whether he lighted it or not to commit his crime, he certainly did not leave it lighted long. Coming out, his foot came in contact with the iron of the register and he was struck by a sudden thought. He had not dared to leave the head of the pin lying on the floor, for he hoped that he had covered up his crime by pulling the heavy cabinet over upon his victim; nor did he wish to carry away such a memento of his cruel deed. So he dropped it down the register, where he doubtless expected it would fall into the furnace pipes out of sight. But the tin box retained it. Is not that plausible, sir?" "I could not have reasoned better myself, madam. We shall have you on the force, yet." But at the familiarity shown by this suggestion, I bridled angrily. "I am Miss Butterworth," was my sharp retort, "and any interest I may take in this matter is due to my sense of justice." Seeing that he had offended me, the astute detective turned the conversation back to business. "By the way," said he, "your woman's knowledge can help me out at another point. If you are not afraid to remain in this room alone for a moment, I will bring an article in regard to which I should like your opinion." I assured him I was not in the least bit afraid, at which he made me another of his anomalous bows and passed into the adjoining parlor. He did not stop there. Opening the sliding-doors communicating with the dining-room beyond, he disappeared in the latter room, shutting the doors behind him. Being now alone for a moment on the scene of crime, I crossed over to the mantel-shelf, and lifted the clock that lay there. Why I did this I scarcely know. I am naturally very orderly (some people call me precise) and it probably fretted me to see so valuable an object out of its natural position. However that was, I lifted it up and set it upright, when to my amazement it began to tick. Had the hands not stood as they did when my eyes first fell on the clock lying face up on the floor at the dead girl's side, I should have thought the works had been started since that time by Mr. Gryce or some other officious person. But they pointed now as then to a few minutes before five and the only conclusion I could arrive at was, that the clock had been in running order when it fell, startling as this fact appeared in a house which had not been inhabited for months. But if it had been in running order and was only stopped by its fall upon the floor, why did the hands point at five instead of twelve which was the hour at which the accident was supposed to have happened? Here was matter for thought, and that I might be undisturbed in my use of it, I hastened to lay the clock down again, even taking the precaution to restore the hands to the exact position they had occupied before I had started up the works. If Mr. Gryce did not know their secret, why so much the worse for Mr. Gryce.