o do I."

"Well," he said, finally, "I'd better get busy, then--there's a lot to
do before we can start. The radio doesn't come next, after all--the
transmitter and receptor units come ahead of it. They won't mean
wasted labor, in any event, since we'll have to have them in case the
radio fails. You'd better lay in a lot of supplies while I'm working
on that stuff, but don't go out of sight, and yell like fury if
you see anything. We'd both better wear full armor every time we go
out-of-doors--unless I'm all out of control we aren't done with those
savages yet. Even though they may be afraid of the demons of the falls,
I think they'll have at least one more try at us."

While Nadia brought in meat and vegetables and stored them away,
Stevens attacked the problem of constructing the pair of tight-beam,
auto-dirigible transmitter and receptor units which would connect his
great turbo-alternator to the accumulators of their craft, wherever it
might be in space. From the force-field generators of the "Forlorn Hope"
he selected the two most suitable for his purpose, tuned them to the
exact frequency he required, and around them built a complex system of
condensers and coils.

Day after day passed. Their larder was full, the receptor was finished,
and the beam transmitter was almost ready to attach to the
turbo-alternator before the calm was broken.

"Steve!" Nadia shrieked. Glancing idly into the communicator plate, she
had been perfunctorily surveying the surrounding territory. "They're
coming! Thousands of them! They're all over the bench up there, and just
simply pouring down the hills and up the valley!"

"Wish they'd waited a few hours longer--we'd have been gone. However,
we're just about ready for them," he commented grimly, as he stared over
her shoulder into the communicator plate. "We'll make a lot of those
Indians wish that they had stayed at home with their papooses."

"Have you got all those rays and things fixed up?"

"Not as many as I'd like to have. You see, I don't know the composition
of the I-P ray, since it is outlawed to everybody except the police.
Of course I could have found out from Brandon, but never paid any
attention to it. I've got some nice ultra-violet, though, and a short-wave
oscillatory that'll cook an elephant to a cinder in about eight seconds.
We'll keep them amused, no fooling! Glad we had time to cover our open
sides, and it looks as though that meteorite armor we put over the
p