s world!" Norman's voice held all his incredulity. "To think that
we should be on it--a second satellite of Earth's--it seems almost
beyond belief."

* * * * *

"Sometimes it seems so to me, too," Fellows said thoughtfully. "But
it's not a bad world--not the human part of it, at least. When this
satellite's atmosphere caught me and pitchforked me down among these
green men, smashing the plane and almost myself, they took care of me.
You say three others vanished as I did? I never heard of them here;
they must have crashed into the sea or jungles. Of course, I'd have
got back to Earth on one of these flying-boats if I'd been able, but
their molecular power won't take them far from this world's surface,
so I couldn't.

"As it was, the green men cared for me, and when I found how those
frog-men have dominated this world for ages, how that city of the
Ralas has spread endless terror among the humans here, I resolved to
smash those monsters whatever I did. I taught some of the green men
like Sarja my own speech, later learning theirs, and in the weeks I've
been here I've been working out a way to smash the Ralas.

"You know that amphibian city is almost impregnable because humans can
hardly live long enough under the water to get into it, let alone
fight under water as the frog-men can. To meet them on even terms the
green men needed diving-helmets with an oxygen supply. They'd never
heard of such an idea, too afraid of the sea ever to experiment in it,
but I convinced them and they've made enough helmets for all their
forces. In them they can meet the Ralas under water on equal terms.

"And there's a chance we can destroy that whole Rala city with their
help. It's built on a giant pedestal of rock rising from the sea's
floor, as you saw, and I've had some of the green men make huge
force-shells or force-bombs that ought to be powerful enough to split
that pedestal beneath the city. If we can get a chance to place those
bombs it may smash the frog-men forever on this world. But one thing
is sure: we're going to get Hackett out if he still lives!"

"Then you're, going to attack the Rala city now?" Norman cried.

Fellows nodded grimly. "While you have slept all the forces of the
green men on this world have been gathering. Your coming has only
precipitated our plans, Norman--the whole soul of the green races has
been set upon this attack for weeks!"

* * * *