unconsciously and inevitably, then the fate of ten men would be just as uncertain as the fate of one. The thing operates by day or night—that much has been proved—and, since it is probably acting automatically, as lightning or steam, how can they escape?"
"This invisible death-dealing force may be in the control of a human mind, remember."
"It is beyond the bounds of possibility, Sir Walter."
"You are a rash man to affirm anything so definite, after what you have gone through with the rest of us. Let me, in my turn, urge you to go to your rest. These things have told upon you. You are only flesh and blood, not iron, as you fancy. The men are all right so far."
"I'll get something to eat and drink," said Mannering, "and leave you in peace for a while."
"Do. You will find all you need in the dining-room. I directed Masters to leave ample there, in case the detectives might want food."
"Shall I bring you something—a whisky, and a biscuit?"
"No, no. I need nothing."
The doctor went his way, and passed an hour with meat and drink. Then he felt an overpowering desire to sleep, but resisted it, lighted his pipe again, and, resumed his march in the hall. He listened presently at the library door, and was gratified to hear a gentle but steady snore. The sound pleased Mannering well.
He padded about once more, resolved to keep awake until the vigil was ended. Then he would
