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 the power of an obsession, and he could not reason himself out of it. He was sure that a great danger threatened Margaret. He could not tell what it was, nor why the fear of it was so persistent, but the idea was there always, night and day; it haunted him like a shadow and followed him like remorse. His anxiety increased continually, and the vagueness of his terror made it more tormenting. He felt quite certain that Margaret was in imminent peril, but he did not know how to help her. Arthur supposed that Haddo had taken her back to Skene; but, even if he went there, he had no chance of seeing her. What made it more difficult still was that his chief at St. Luke’s was away, and he was obliged to be in London in case he should be suddenly called upon to do some operation. But he could think of nothing else. He felt it urgently needful to see Margaret. Night after night he dreamed that she was at the point of death, and heavy fetters prevented him from stretching out a hand to help her. At last he could stand it no more. He told a brother surgeon that private business forced him to leave London, and put the work into his hands. With no plan in his head, merely urged by an obscure impulse, he set out for the village of Venning, which was about three miles from Skene.

It was a tiny place, with one public-house serving as a hotel to the rare travellers who found it needful to stop there, and Arthur felt that some explanation of his presence was necessary. Having seen at the station an advertisement of a large farm to let, he