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Rh possible to awaken Miss Chalmers at, say, three o'clock?"

"Certainly."

"Will you do so then, and summon Miss Meade—but no one else—to take your place?"

"At three o'clock. I understand, Sergeant. You think that if there was really danger to my patient it will be over then?"

"Absolutely; but since you still doubt that the danger existed you may be interested in knowing that I sent a sample of broth which I suspected of having been poisoned to Villard, the analytical chemist, and he reports unmistakable evidence of white arsenic," Odell added hurriedly. "Not a word of this, however. When Miss Meade has taken your place come to me at once in Rannie Chalmers's room."

"I will, sir; but this confirmation of your suspicions fills me with distress," Doctor Adams declared. "I admit that I was not convinced even after an examination of my patient that she was indeed the victim of such an outrage. In the many years of my professional experience I have never before come into contact with crime; and the comparative monotony of a general practitioner's work must have dulled my perceptions."

"It is not always easy to see a thing, Doctor, even when you are looking for it," Odell replied from the consciousness of the revelation which had come to himself only that morning. "By the way, will it be safe to move Mr. Lorne this afternoon from his own room into that of his stepson next door?"

"Yes, I think so." The physician looked his surprise. We can assist him through the connecting door between it