Jarvis is not an expert at tying knots, though there are some other things that he understands pretty well."
"How did this happen?"
"It was a clever trick," said Chick. "He threw some kind of a drug into my face. If I hadn't known--thanks to your teaching long ago--just what to do in a case of that kind, I should have gone to sleep in a second.
"As it was, the drug made my head swim. But I kept it out of my lungs, and pulled through.
"Of course, I pretended to be unconscious, for I wanted to see what he would do. He tied me up rather clumsily; gagged me exceedingly well; and laid me on this slab, after removing a headless body.
"He went down into the cellar, and I slipped my bonds and followed him.
I found him getting his furnace ready.
"Knowing what he would do, I got back to my downy couch here, pulled the bed-clothes over me, and waited.
"He came back and got the body of my predecessor and took it down cellar. Of course, he is burning it. Look out! He's coming!"
Chick quickly replaced the sheet.
Nick could see that beneath it Chick slid his hands again within the rope that had been used to bind him.
Then Nick sprang toward the door of the doctor's room, pushed out a case of instruments from the wall, and got behind it.
Dr. Jarvis went to Chick's side, lifted the sheet, and looked at the quiet face.
Then he felt of the rope, but it seemed to be tight.
He replaced the sheet, and came toward the door beside which Nick was concealed.
No sooner had Jarvis passed within the room than Nick came out of his hiding-place and followed the doctor.
Jarvis was engaged in putting a few articles into a small bag. His back was toward the door, but he heard Nick's entrance and turned quickly.
He sprang to his feet with a cry. Then his hands fell to his sides. He was the picture of despair.
"I see," said Nick, "you were preparing to run away."
Jarvis made no answer.
"That would have been the most foolish thing you could do," said Nick.
"It would have been equivalent to confession."
"And why not?" groaned the doctor.
"Do you admit your guilt?"
"No, I do not," said Jarvis firmly; "but everything is against me."
"Well, we will consider that subject later. What did you intend to do with my friend yonder?"
He pointed through the open door toward Chick.
"Nothing," said Jarvis. "I intended simply to leave him there. He would not have been discovered till I had got a good start."
"I believe that you did not intend to injure him," said Nick. "I suppose he might as well get up now."
He uttered a peculiar call. Chick instantly sat up under the sheet. Then he threw it aside, got down from the slab, and advanced toward Nick and Jarvis, removing his gag and bonds as he did so.
Jarvis regarded this performance with wonder.
"You should take some lessons in tying knots," said Nick.
"And now," he continued, "we will take you to my house."
"Arrest me?"
"I would hardly call it by that name, unless you prefer it."
"But I am innocent."
"That question we will pass for the present. There is one link wanting in the chain of evidence against you. I shall supply that link, and then we will see what comes of it."
With a hasty movement, Dr. Jarvis took a little vial from his pocket, and raised it toward his lips.
But Nick had been watching. He struck the vial from the doctor's hand, and it went flying through the window.
"If you will give me your word of honor not to attempt suicide again,"
said Nick, calmly, "I will not handcuff you."
Jarvis hung his head.
"Your word will bind you for three days, no more," said Nick.
"I promise," said the doctor.
"Remove your dressing-gown and cap," said Nick.
Jarvis complied with the request, and Nick received the articles from his hands. Leaving the care of the prisoner to Chick, he carried the dressing-gown to the window.
"Ah!" said he, "you have torn the dressing-gown."
"Where?" asked the doctor.
"It is ripped under the arms," Nick replied, "and the cloth is strained beside each shoulder seam on the back."
"I was not aware of it," said Jarvis.
"Put it on again," said Nick, and the doctor obeyed.
Nick studied his figure carefully. He made Jarvis assume a number of positions, and at last seemed satisfied.