Some of the men eased the tension by blowing ribbons of smoke or by relighting tobacco that had gone out while the stranger had been talking. Others shifted, a bit uneasily. Voices began to mutter, pro and con. The Master suddenly knocked again, for silence.

"I am going to accept this man," said he, sharply. "You notice I do not put this to a vote, or consult you about it. Nor shall I, in anything. The prime condition of this whole undertaking, as I was saying when Captain Alden here arrived, is unquestioning obedience to my authority.

"No one who is unwilling to swear that, need go any further. You must have confidence in my plans, my judgment. And you must be willing to obey. It is all very autocratic, I know, but the expedition cannot proceed on any other basis.

"You are to go where I will, act as I command, and only regain your liberty when the undertaking is at an end. I shall not order any man to go anywhere, or do anything, that I would not do myself. On this you can rely.

"In case of my death, the authority falls on Major Bohannan. He is today the only man who knows my plans, and with whom I have had any discussion. If we both are killed, then you can elect your own leader. But so long as either of us lives, you have no authority and no redress. I hope that's perfectly understood. Does any man wish to withdraw?"

Not one budged. All stood to their decision, hard as rock.

"Very well," said the Master, grimly. "But remember, disobedience incurs the death penalty, and it will be rigorously enforced. My word is to be supreme.

"Such being the case, I decide to take this man. His skill as an aviator cannot be denied. We shall need that. His ability to endure suffering and still remain efficient seems proved. That may be valuable; probably will be.

"I shall examine his credentials. If he turns out to be a spy—well, life will be short, for him."

He addressed himself to the masked aviator, who was still standing in an attitude of military attention.