"What," demanded the Master, "is your opinion of the peculiar and
sudden fall of all your companions?"

"I have no opinion as to that. Strange air-currents, failure of
ignition due to lack of oxygen--how do I know? A thousand things may
happen in the air."

"Not to more than a hundred planes, all in a half-hour."

The Frenchman shrugged indifferent shoulders and smiled.

"It does not signify, in the least," he murmured. "I am here. That
suffices."

"Do you realize that I, perhaps, have forces at my command which may
negative ordinary conditions and recognized laws?"

"Nothing can negative the forces of organized society. I repeat my
request, _monsieur_, for your unconditional written surrender."

The Master's hand slid over the desk and rested a moment on a button
there. A certain slight tremor passed through the Frenchman's body.
Into his eyes leaped an expression of wonder, of astonishment. His
mouth quivered, as if he would have spoken; but he remained dumb.
The hand that held his cigarette, resting on his knee, relaxed; the
cigarette fell, smoldering, to the metal plate. And on the instant the
fire in it died, extinguished by some invisible force.

"Are you prepared to sign a receipt for this airship, if I deliver her
over to you, sir?" demanded the Master, still speaking in French. He