"Then he's a precious clever dog if he does, that's all I can say, because if you are right that inner cellar has been robbed and carefully built up again." "This cellar has certainly been opened, sir, and built up again," said George, drawing his breath with a peculiar hiss as a curious suspicion seemed to flash through the dark parts of his brain. Meanwhile the dog had watched every movement in silence, but only to grow excited again and stand barking. "I'm of opinion," said the old lawyer dogmatically, "that Bruno smells a rat, and that you have discovered a mare's nest. Why, hang it, man, don't look at me in that ghastly manner. What's the matter?" "I don't know, sir, but I have a horrible suspicion." "Good heavens! My dear young friend, what do you mean?" "I may be wrong, sir, but look at that dog." "Yes, I believe he is going mad." "I do not, sir. He has made a discovery." "Yes, of rats," said the lawyer pettishly. "I tell you once more, sir, I may be wrong; but Bruno seems to have found the clue I sought in vain." "Clue?--what clue?" "We have been searching for the man who called himself George Harrington." "You have, sir. I have not." "Well, I have. It may sound romantic and strange, but at the present moment I have a horrible dread that we have found him at last." "What do you mean--where?" For answer George Harrington pointed to the wall. "What?" ejaculated the old man, in a hoarse whisper, and he caught at and held tightly by his companion's arm. "I have had suspicions flashing about in a vague way in my brain, sir, but I could not arrange them. Now they begin to assume shape." "Great heavens!" "Look here, sir. This dog has been lying half dead ever since the disappearance of that man." "Yes." "What does he do as soon as he encounters Saul Harrington?" "Fly at him." "Yes. Why should he? Surely he has not been in the habit of trying to get at the throat of a relative and visitor of the house." "That's quite true; certainly." "You see the dog is as gentle with us as can be. Go to him yourself, and pat him." "I hardly--Yes, I will," said the old man, mastering his dislike and dread; and, taking a couple of steps forward, he patted the dog's head. "Why, Bruno, old dog, what's the matter?" he said in an awe-stricken whisper. The dog swung round, looked at him, barked loudly, then rose up at him, placing his paws on his shoulders, and howled mournfully. "There, you see," said George, laying his hand on the dog's head. "Mad? No more than we are." "But--but what has that to do with your theory of the man's disappearance?" "Mr Hampton, I am not going to place it before you in words. My suspicion is that there has been foul play, and unless I am wrong, that man lies murdered behind yonder wall." The old lawyer caught him by the arm, and looked in his face with his own turning quite white.