"He's gone through!" I called. Then I saw him on the land side. He had escaped us and joined the Robots. The lights showed them all coming for the gate.
And then Tina abruptly found the loosened wire.
"I have it!" she exclaimed.
She stood up, tugging with all her strength at the great switch-lever. I saw, up there on the top of the dam, a surge of sparks as the current hissed into the wall-barrier; saw the barrier glow a moment and then subside. And presently the lights of the balked Robots, Tugh with them, retreated back into the wrecked and blood-stained city.
"We did it!" exclaimed Larry. "We're impregnable here. Tina, now the air-power, for help may be on its way. And then call some other city. Can you do that? They must have sent us help by now."
n a moment the air-power went on, and the city lighting system. Then Tina was at the great transmitter. As she closed the circuits, London was frantically calling us. In the midst of the chaos of electrical sounds which now filled the control room, came the audible voice of the London operator.
"I could not get you because your circuit was broken," it said. "Our air-vessel Micrad; bearing the large projector of the Robot-deranger, landed on the ocean surface two hundred miles from New York harbor. It was forced down when your district air-power failed."
Tina said hurriedly, "Our air-power is on now. Is the Micrad coming?"