I touched his hand, where it rested on the projector; his fingers were cold, but steady.

This forward gondola-cabin, hanging almost under the nose of the swift, small ship, was silent, with only a low thrum audible from the rear motors.

From where we sat, with Lea beside us at the projector, the wide transparent windows gave us an unobstructed view forward and down. We were rising now from the Hudson air-stage—a brief flight, and we would be over the city roof. Sixty minutes! The world-power was off now; in sixty minutes it would flash on again and our weapon would be useless. Sixty minutes! A very little time! Yet, it can be an eternity.

The officials at the Hudson shops had said to Alan and me: "You know this girl—and she knows the weapon—its operation. The Council ordered that one of you operate it, with the girl beside you."

I looked at Alan. My heart was pounding. I wanted Alan to speak, and he did not. It seemed that he never would. Then he said: "I'm older—I'll do it, if—if they think I should."

No executioner at his switch in the little room behind an electric chair of our day could ever have shuddered as Alan now must be shuddering. But he held himself firm when once we were in the ship's cabin. The controls, with a white-faced young pilot seated at them, were near us. There were several other men in the cabin, with observation instruments; and at a bank of mirrors, receivers and audiphones three operators held us in close communication with the city authorities. Our commander moved quietly about; seldom speaking; but intent upon every detail.

Sixty minutes! Five of them were already gone when—with the world-power dead at the Trinight Hour—we hastily stripped our mechanism of its insulation and rose from the landing-stage. The gigantic city loomed into the sky before us. The night was still overcast.

We climbed steeply, then levelled, and presently we were over the city roof; a thousand feet over it perhaps; and beneath us it spread in the darkness like a great rolling expanse of soiled canvas.

We had not heard Nanette's voice again. Precautions were taken against the eavesdropping. What Turber personally may have learned of our plans we never knew. Nothing probably, until near the end. He had no warning that the world-power was to be shut off. The battle everywhere in the city was undiminished in its fury. It was raging down there now. Our mirrors, here in the cabin, occasionally shadowed it, but there was no other sign.