The Russian was first to speak. "You have nitroglycerin there, yes?" he asked, pointing toward my medical kit that I had gripped unconsciously and carried with me during the mad rush down the passage. I nodded and drew it out. "Hypodermic," he ordered next, curtly; took the syringe, filled it accurately with its one one-hundredth of a grain dosage, and leaned over Huldricksson. He rolled up the sailor's sleeves half-way to the shoulder. The arms were white with somewhat of that weird semitranslucence that I had seen on Throckmartin's breast where a tendril of the Dweller had touched him; and his hands were of the same whiteness--like a baroque pearl. Above the line of white, Marakinoff thrust the needle. "He will need all his heart can do," he said to me. Then he reached down into a belt about his waist and drew from it a small, flat flask of what seemed to be lead. He opened it and let a few drops of its contents fall on each arm of the Norwegian. The liquid sparkled and instantly began to spread over the skin much as oil or gasoline dropped on water does--only far more rapidly. And as it spread it drew a sparkling film over the marbled flesh and little wisps of vapour rose from it. The Norseman's mighty chest heaved with agony. His hands clenched. The Russian gave a grunt of satisfaction at this, dropped a little more of the liquid, and then, watching closely, grunted again and leaned back. Huldricksson's laboured breathing ceased, his head dropped upon Larry's knee, and from his arms and hands the whiteness swiftly withdrew. Marakinoff arose and contemplated us--almost benevolently. "He will all right be in five minutes," he said. "I know. I do it to pay for that shot of mine, and also because we will need him. Yes." He turned to Larry. "You have a poonch like a mule kick, my young friend," he said. "Some time you pay me for that, too, eh?" He smiled; and the quality of the grimace was not exactly reassuring. Larry looked him over quizzically. "You're Marakinoff, of course," he said. The Russian nodded, betraying no surprise at the recognition. "And you?" he asked. "Lieutenant O'Keefe of the Royal Flying Corps," replied Larry, saluting. "And this gentleman is Dr. Walter T. Goodwin." Marakinoff's face brightened. "The American botanist?" he queried. I nodded. "Ah," cried Marakinoff eagerly, "but this is fortunate. Long I have desired to meet you. Your work, for an American, is most excellent; surprising. But you are wrong in your theory of the development of the Angiospermae from Cycadeoidea dacotensis. Da--all wrong--" I was interrupting him with considerable heat, for my conclusions from the fossil Cycadeoidea I knew to be my greatest triumph, when Larry broke in upon me rudely. "Say," he spluttered, "am I crazy or are you? What in damnation kind of a place and time is this to start an argument like that? "Angiospermae, is it?" exclaimed Larry. "HELL!"