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Rh I suppose I must have chatted with him for half an hour in the presence of his wife, and he became quite satisfied.

"It's a good job, Dora, that it isn't anything serious," he said laughing, as he fondly took his wife's hand—the hand which intended to murder him. "I really thought I was in for something very bad."

"Yes, and so did I, dear. I've been worrying all night," she replied. "But Dr. d'Escombe declares that you'll be all right again in a few days, and then we'll go down to Coombe for a month or so. The moorland air always does you so much good. So cheer up, dearest, and be patient." And she pressed his hot hand tenderly.

Her eyes met mine. Then I walked across to the window. To save the man, the serum should have been administered then and there. I knew sufficient of diphtheria to be well aware that at five o'clock it would probably be too late, even if I then administered it.

The Captain entered the room, followed by the nurse whom I had engaged by telephone. To her, I gave instructions in the presence of them both, and shortly afterwards, after calling the nurse aside and telling her the true nature of the case, I left the house.