Archibald Mackenzie, who all this time knew, or at least suspected the truth, held himself in cunning silence. The preceding evening he, for want of something to do, had strolled into the laboratory, and, with the pure curiosity of idleness, peeped into the presses, and took the stoppers out of several of the bottles. Dr. Campbell happened to come in, and carelessly asked him if he had been looking in the presses; to which question Archibald, though with scarcely any motive for telling a falsehood, immediately replied in the negative. As the doctor turned his head, Archibald put aside a bottle, which he had just before taken out of the press; and, fearing that the noise of replacing the glass stopper would betray him, he slipped it into his waistcoat pocket. How much useless cunning! All this transaction was now fully present to Archibald's memory: and he was well convinced that Henry had not seen the bottle when he afterwards went to lock the presses; that the cat had thrown it down; and that this was the cause of all the yelling that disturbed the house. Archibald, however, kept his lips fast closed; he had told one falsehood; he dreaded to have it discovered; and he hoped the blame of the whole affair would rest upon Forester. At length the animal flew with diminished fury at the door; its screams became feebler and feebler, till, at last, they totally ceased. There was silence: Dr. Campbell opened the door: the cat was seen stretched upon the ground, apparently lifeless. As Forester looked nearer at the poor animal, he saw a twitching motion in one of its hind legs; Dr. Campbell said, that it was the convulsion of death. Forester was just going to lift up his cat, when his friend Henry stopped his hand, telling him, that he would burn himself, if he touched it. The hair and flesh of the cat on one side were burnt away, quite to the bone. Henry pointed to the broken bottle, which, he said, had contained vitriolic acid. Henry in vain attempted to discover by whom the bottle of vitriolic acid had been taken out of its place. Suspicion naturally fell upon Forester, who, by his own account, was the last person in the room before the presses had been locked for the night. Forester, in warm terms, asserted, that he knew nothing of the matter. Dr. Campbell coolly observed, that Forester ought not to be surprised at being suspected upon this occasion; because every body had the greatest reason to suspect the person, whom they had detected in one _practical joke,_ of planning another. "Joke!" said Forester, looking down upon his lifeless favourite; "do you think me capable of such cruelty? Do you doubt my truth?" exclaimed Forester, haughtily. "You are unjust. Turn me out of your house this instant. I do not desire your protection, if I have forfeited your esteem." "Go to bed for to-night in my house," said Dr. Campbell; "moderate your enthusiasm, and reflect coolly upon what has passed."