an arm back to shut off a small machine supported by a steel girder. The shrilling whine began to fade. Abruptly it stopped. Another noise began instead, and a steady and deepening beat progressed from a mere tap to what approximated thunder. The aura flashed and crackled. Seller's face became strained and worn. He hunched over the controls and spun them desperately. Now the throbbing was like a continuous earthquake. The metal walls shivered and quaked. Lightning played from floor to ceiling and outlined the scene in a hideous glare.
"Zero to micro!" screamed Sellers above the terrific clangor, "the spectrum is as empty as the ether. There's nothing here but us. . . ."
He glanced suddenly to one side. Abruptly his face became a congealed mass of horror beyond description. His eyes bulged to the bursting point. His fat hands fell to his sides and quivered like lumps of jelly. The others, startled, followed his gaze as the thunder died and the room was immersed in utter silence.
On the floor lay the prone body of the Chief. His head was missing.
IV
Payton lifted his hand for silence and the murmurings of the defenders, assembled again in a body, died away.
"In accordance with the often-expressed wishes of the Chief, and with the sealed orders he left to be opened in the event of an emergency resulting in his death or disability, I am taking over the command."
He paused to let the words sink into the consciousness of the assembly, then sheafed through a many-paged document before him.
"This," he continued, "was apparently drawn up many years ago, yet there are matters in it which should be brought to the attention of all of us. I shall read those portions which seem to me to be applicable at the present time."
He cleared his throat, lifted the papers closer to his eyes and read aloud, slowly, "The entire function of the Chief's office has been and must continue to be such as can be outlined in the simple phrase: 'Keep the fortress going.' All other matters must be subordinated to this aim.
"However, there may come a time when the further pursuance of this aim would be sheer folly, when infinitely superior forces opposed to us make further resistance useless.
"In such a case, the only course is to determine if a peace, on terms acceptable to us as human beings, can be made with the Enemy. Ours is a struggle for survival and a possible ultimate victory. What military aims we may have had when the war started cannot now be determined, still a study of such history as is available to us shows that eventually one side in a war must prevail.
"So long as the Fortress can be successfully defended, then so long must our efforts continue unabated. But if at any time it becomes apparent that our maximal achievements are inadequate to the protection of the Fortress and its defenders, then the question of surrender must be considered.
"To my successor, therefore, I submit the proposition that the acceptance
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