Dr. O’Grady left the room and closed the door behind him. His spirits, owing to the ten-pound note which lay in his breast pocket, were cheerful. He whistled “The Minstrel Boy” as he walked along the passage. Just as he reached that part of the tune which goes with the discovery of the boy in the ranks of death he stopped abruptly and swore. He was seized from behind by two men, flung to the ground with some violence, and held there flat on his back. A few useless struggles convinced him that he could not make good his escape. He lay still and looked at his captors. The foreign gentleman with the long black beard was one of them. The other was the man whom Dr. O’Grady had declared to be a Norwegian. He was a powerful man, adorned with a mass of fair hair which fell down over his forehead and gave him a look of unkempt ferocity. Behind these two who knelt beside and on Dr. O’Grady stood Mr. Red. “Hullo, Emperor!” said the Doctor, “what’s the game now? If you want a gladiatorial show, with me and these two swashbucklers as chief performers, you ought to have given me fair notice. You can’t expect a man to put up much of a fight when he’s caught from behind just as he’s in the middle of whistling a tune.” “You have learned too much,” said Mr. Red, with fierce intensity. “It is necessary in the interests of the Brotherhood to secure your silence.” “Right,” said Dr. O’Grady. “You shall secure it. One hundred and fifty pounds down and the secrets of the Brotherhood are safe. Or if prompt cash inconveniences you in any way, I’ll be quite content with your name on the back of a bill. Jimmy O’Loughlin would cash it.” “I have passed judgment on you,” said Mr. Red, “and the scales are depressed on the side of mercy. Your life is spared. You remain a captive until the plans of the Brotherhood are matured and discovery can be set at defiance. Then you will be released.” “If that’s all,” said Dr. O’Grady, “you needn’t have knocked me down and set these two brigands to kneel on my chest and legs. I haven’t the slightest objection to remaining a captive. I shall enjoy it. Of course, I shall expect to be paid a reasonable fee for my time. I’m a professional man.” “Number 2 and Number 3,” said Mr. Red, “will bind you and convey you to the place of confinement.” He spoke a few words to his assistants in a language which Dr. O’Grady did not understand. Two ropes were produced. “If you choose to tie me up,” said Dr. O’Grady, “you can do it of course. But you’ll simply be wasting time and energy. I’ve told you already that I don’t in the least mind being a captive. Just you tell me the place you want me to go to, and if it isn’t an insanitary, underground dungeon, I shall step into it with the greatest pleasure, and stay there without making the least attempt at escape as long as you choose to go on paying me my fees.” “Give your parole,” said Mr. Red.