"Look!" he said, again, suddenly. "Up on top of the tower! There is
something going up there--it's outlined against that white cloud!"
Harry followed with his eyes. And Dick was right. A long, thin pole was
rising, even as they looked. Figures showed on the roof of the tower. They
were busy about the pole. It seemed to grow longer as they watched. Then,
suddenly, the dangling wires they had first noticed were drawn taut, and
they saw a cross-piece on the long pole. And then, with a sudden rush of
memory, Harry understood.
"Oh! We have struck it!" he said. "I remember now--a portable, collapsible
wireless installation! I've wondered how they could use wireless, knowing
that someone would be sure to pick up the signals and that the plant would
be run down. But they have those poles made in sections--they could hide
the whole thing. It takes very little time to set them up. This is simply a
bigger copy of what they use in the field. We've got to get out!"
He looked at his watch.
"Carefully, now," he said. "We've just about got time. That sentry must be
just about passing the place where we got over the wall now. By the time we
get there he'll be gone, and we can slip out. We've got everything we came
for, now that we've seen that!"
They started on the return journey through the woods.
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