Jerry Foster stared, open-mouthed. The pistol lagged in his limp hand.
"To the moon!" he gasped.

Then: "See here," he said firmly. "I've got you where I want you."--he
held the pistol steady--"and now I'm going to learn what's back of
this. I think you are crazy, absolutely crazy. But, tell me, who are
you? What do you think you're doing? What was the meaning of that
roaring blast?"

* * * * *

The man looked up. "You don't know?" he asked eagerly. "You really
don't?"

"No," said Jerry; "but I'm going to find out."

"Yes," the other agreed. "Yes, you can, now that you've got the
upper-hand. I guess I was half crazy when I thought I had been spied
out. But I'll tell you."

He sat erect. "I am Thomas J. Winslow," he said, and made the
statement as if it were an explanation in itself.

"Well," said Jerry, "that's no burst of illumination to my ignorance.
Come again."

The man called Winslow was ready--anxious--to talk.

"I am an inventor. I have made millions of dollars"--Jerry looked at
the disheveled apparel of the speaker and smiled--"for other people.
The Stillwater syndicate stole my valveless motor. Then I developed my
television set. Goodwin beat me out of that: he will have it on the
market inside of a year. I swore they should never profit by this, my
greatest invention."

Jerry was impressed in spite of himself by the man's earnest
simplicity.

"What is it?" he asked.

"I've broken the atom," said Winslow. "First tore the atoms of
hydrogen and oxygen apart--dissociated them in the molecule of
water--and have resolved them into their energy components. That's
what you heard--the reaction. It it self-sustaining, exothermic. That
hot blast carried off the heat of my retort."

* * * * *

Winslow rose from the bunk. Gone was his listless despondency.

"Put up that gun," he said: "you don't need it now. I think we
understand each other better than we did." He crossed with quick
strides to the door leading into the cliff.

"Come with me," he told Foster. "I am leaving to-day. You will not
stop me. But before I go I will show you something no other man than
myself has ever seen."

He led the way through the doorway. There was another room beyond,
Jerry saw. It was a cave. Plainly Winslow had taken these caves in the
rocks and had made of them a laboratory.

A lantern gave scant illumination: Jerry made out a small electric
generator,