“Good Lord!” exclaimed the detective reverently, as he got his first view of it. “The fiends!”

Patsy, used as he was to scenes of crime and bloodshed, actually shrank back a little as his eyes fell upon the horrible spectacle, and even Doctor Cooke was visibly affected when he staggered in, with the nurse clinging desperately to him.

Nick and Patsy made way for him without attempting to draw nearer to the table. They had seen all they could endure for the moment, and were already waiting for the advent of the surgeons.

Willis Cooke kept on to the unconscious girl’s side, however, without paying any more attention to the nurse than if she had been a puppy tugging at his trousers leg.

He bent over the still, mutilated form, scrutinized the exposed heart for a moment, and then took in the thinness of the arms, the prominence of the ribs in the slightly emaciated body, and the rather sunken cheeks, in which faint spots of unnatural color still lingered, despite the pallor, due to the drug and the operation.

Suddenly he raised his head and turned to Nick. His jaw was suggestively prominent, and there was a steely glitter in his eyes, which boded no good to Doctor Hiram Grantley and the latter’s associates.

“There is absolutely no excuse for this,” he said quickly, as if conscious that those responsible for the girl’s condition were already at the door. “Her heart is perfectly healthy. She has tuberculosis—that’s the way Grantley got his hands on her. I suppose he promised to cure——”

But he had no time to finish the sentence.

At that moment Doctor Grantley himself, clothed in white from head to foot, burst into the room, a malignant snarl on his strongly marked, sinister face.

And after him came Doctor Siebold and the six visiting surgeons.