Then suddenly there was a new development.
"Greg, Craven has found something!” Russ cried. “I can't get him!"
Supervising the installation of a new televisor set, Greg spun around. “What's that?"
"Craven! I can't reach him. He's blocking me out!"
Greg helped, but the apparatus was unable to enter the Interplanetary building in New York. Certain other portions of the city adjacent to the building also were blanketed out. In all the Solar System, the Interplanetary building was the only place they could not enter, except the Sun itself.
Craven had developed a field from which their field shied off. The televisor seemed to roll off it like a drop of mercury. That definitely ended all spying on Craven and Chambers.
Russ mopped his brow, sucked at his dead pipe.
"Light penetrates it,” he said. “Matter penetrates it, electricity, all ordinary forces. But this field won't. It's… well, whatever Craven has is similarly dissimilar. The same thing of opposite nature. It repels our field, but doesn't affect anything else. That means he has analyzed our fields. We have Wilson to thank for this."
Greg nodded gravely. “There's just one thing to be thankful for,” he declared. “He probably isn't any nearer our energy than he was before. But now we can't watch him. And that field of his shows that he has tremendous power of some sort."
"We can't watch him, but we can follow him,” corrected Russ. “He can't shake us. None of them can. The mechanical shadow will take care of that. I have one for Craven with a bit of ‘bait’ off his spectacles and he'll keep those spectacles, never fear. He's blind as a bat without them. And we can track Chambers with his ring."