On looking at his watch he found it was close on midnight; and, not sorry for the _divertissement_, he made up his fire and made himself his nightly pot of tea. He had got through a good spell of work, and thought himself entitled to a cigarette; and so he sat on the great oak chair before the fire and enjoyed it. Whilst smoking he began to think that he would like to know where the rat disappeared to, for he had certain ideas for the morrow not entirely disconnected with a rat-trap. Accordingly he lit another lamp and placed it so that it would shine well into the right-hand corner of the wall by the fireplace. Then he got all the books he had with him, and placed them handy to throw at the vermin. Finally he lifted the rope of the alarm bell and placed the end of it on the table, fixing the extreme end under the lamp. As he handled it he could not help noticing how pliable it was, especially for so strong a rope, and one not in use. “You could hang a man with it,” he thought to himself. When his preparations were made he looked around, and said complacently: “There now, my friend, I think we shall learn something of you this time!” He began his work again, and though as before somewhat disturbed at first by the noise of the rats, soon lost himself in his propositions and problems. Again he was called to his immediate surroundings suddenly. This time it might not have been the sudden silence only which took his attention; there was a slight movement of the rope, and the lamp moved. Without stirring, he looked to see if his pile of books was within range, and then cast his eye along the rope. As he looked he saw the great rat drop from the rope on the oak arm-chair and sit there glaring at him. He raised a book in his right hand, and taking careful aim, flung it at the rat. The latter, with a quick movement, sprang aside and dodged the missile. He then took another book, and a third, and flung them one after another at the rat, but each time unsuccessfully. At last, as he stood with a book poised in his hand to throw, the rat squeaked and seemed afraid. This made Malcolmson more than ever eager to strike, and the book flew and struck the rat a resounding blow. It gave a terrified squeak, and turning on his pursuer a look of terrible malevolence, ran up the chair-back and made a great jump to the rope of the alarm bell and ran up it like lightning. The lamp rocked under the sudden strain, but it was a heavy one and did not topple over. Malcolmson kept his eyes on the rat, and saw it by the light of the second lamp leap to a moulding of the wainscot and disappear through a hole in one of the great pictures which hung on the wall, obscured and invisible through its coating of dirt and dust.