By midnight, Julia was superintending the construction of a second signal generator. Work on the first one was temporarily stalled; the technicians were waiting for a special transformer.

Dr. Norvel was waving an inked-in schematic diagram before the face of a gray haired man in an apron. "No, no, no," she said. "It's got to be this way to set up the right harmonics."

A major came up and tugged apologetically at Julia's arm. "Are you in charge here?"

"I'm sure I don't know."

"Well, if you are—please, Miss, my men have to rest. Can I let them go now?"

"We're not quitting 'til we finish—I'm sure of that."

The major went away, looking for someone else in authority.

Walt, his mutant bridge restored, was inspecting the second signal generator with interest. With it, the technicians would determine the signal that interfered with his frequency. They would set it to throb out that signal.

One section of the transmitter cable ran to each signal generator. A sergeant had just finished installing a switch that would control the signal being fed into the output line. After the first mutant wave had been captured, the switch would be thrown to the left. The signal covering Walt's powers would then be transmitted to the same network of radio and television stations that had carried the one covering Julia's; and the second wave would be reduced to earth normal.