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Rh that crime to have been premeditated, and that the man who committed it was mad. He is, no doubt, at large now, walking about and conducting himself as sanely as you or I, yet the germ of insanity is there, and sooner or later he will commit another crime."

"How do you know it was premeditated?" asked Frettlby, abruptly.

"Anyone can see that," answered the other. "Whyte was watched on that night, and when Fitzgerald went away the other was ready to take his place, dressed the same."

"That's nothing," retorted Frettlby, looking at his companion sharply. "There are dozens of men in Melbourne who wear evening dress, light coats and soft hats—in fact, I generally wear them myself."

"Well, that might have been a coincidence," said the doctor, rather disconcerted; "but the use of chloroform puts the question beyond a doubt; people don't usually carry chloroform about with them."

"I suppose not," answered the other, and then the matter dropped. Chinston made an examination of Mark Frettlby, and when he had finished his face was very grave, though he laughed at the millionaire's fears.

"You're all right," he said, gaily. "Action of the heart a little weak, that's all—only," impressively, "avoid excitements—avoid excitement."

Just as Frettlby was putting on his coat, a knock came to the door and Madge entered.

"Brian is gone," she began. "Oh, I beg your pardon, doctor—but is papa ill?" she asked with sudden fear.

"No, child, no," said Frettlby, hastily, "I am all right; I thought my heart was affected, but it isn't."

"Not a bit of it," answered Chinston, reassuring. "All right—only avoid excitement."

But when Frettlby turned to go to the door, Madge, who had her eyes fixed on the doctor's face, saw how grave it was.

"There is danger?" she said, touching his arm as they paused for a moment at the door.

"No! no!" he answered hastily.

"Yes, there is," she persisted. "Tell me the worst, it is best for me to know."