to be very cautious in his interview, and thanked the lucky chance which had placed a specious pretext in his coat pocket. He was very cool and assured as he rose to reply. "I didn't think you'd care to have things dragged before a subordinate, but I thought you ought to see this article at once." He drew forth the magazine given him by Dr. MacNeil and handed it to Clarendon. "On page 542--you see the heading, 'Black Fever Conquered by New Serum.' It's by Dr. Miller of Philadelphia--and he thinks he's got ahead of you with your cure. They were discussing it at the club, and MacNeil thought the exposition very convincing. I, as a layman, couldn't pretend to judge; but at all events I thought you oughtn't to miss a chance to digest the thing while it's fresh. If you're busy, of course, I won't disturb you----" Clarendon cut in sharply. "I'm going to give my sister an hypodermic--she's not quite well--but I'll look at what that quack has to say when I get back. I know Miller--a damn sneak and incompetent--and I don't believe he has the brains to steal my methods from the little he's seen of them." Dalton suddenly felt a wave of intuition warning him that Georgina must not receive that intended dose. There was something sinister about it. From what she had said, Alfred must have been an inordinately long time preparing it, far longer than was needed for the dissolving of a morphine tablet. He decided to hold his host as long as possible, meanwhile testing his attitude in a more or less subtle way. "I'm sorry Georgina isn't well. Are you sure that the injection will do her good? That it won't do her any harm?"Clarendon's spasmodic start showed that something had been struck home. "Do her harm?" he cried. "Don't be absurd! You know Georgina must be in the best of health--the very best, I say--in order to serve science as a Clarendon should serve it. She, at least, appreciates the fact that she is my sister. She deems no sacrifice too great in my service. She is a priestess of truth and discovery, as I am a priest." He paused in his shrill tirade, wild-eyed, and somewhat out of breath. Dalton could see that his attention had been momentarily shifted. "But let me see what this cursed quack has to say," he continued. "If he thinks his pseudo-medical rhetoric can take a real doctor in, he is even simpler than I thought!" Clarendon nervously found the right page and began reading as he stood there clutching his syringe. Dalton