. You and two or three others
were missing, but none of you had definite assignments, anyway. I was
pretty sure it was you, knowing your ability for getting into trouble,
but it wasn't until we got the message about the Earthman with your
initials that we were really sure."

"When did you find out Frank Miller was the Earthman?" Rick asked.

"Then and there. He let out a sort of funny cry, grabbed his stomach,
and fainted dead away. We brought him to, and he started crying that he
hadn't meant to hurt anyone.

"Dr. Bond asked him bluntly if he was the Earthman, and he was so shaken
I guess he didn't even think of trying to get out of it. He just nodded.
Gee-Gee Gould had him by the throat in a minute, and I think he would
have strangled him. But we got him off Miller and persuaded him to let
the law take its course.

"After Dr. Bond and Miller finished putting the monk in place and
started down, Miller said he had left his tool kit, and went back to get
it. He must have changed the circuit then. I suppose in his excitement
and fear of discovery he forgot the door. Later, he must have remembered
and went back to close it, not knowing you were inside. Dr. Bond blames
himself because he didn't stay with Miller."

Rick shook his head. "I can't understand it. Why would Miller do such a
thing?"

"Obviously, he isn't a normal human being, in our sense of the word."

"You mean he's insane?" Scotty asked.

"No. Not insane. He's what some people call a psychopath. He is not
morally responsible. In other words, he can't distinguish right from
wrong, as most people understand the terms."

"That explains why he was able to do those things," Rick agreed. "But it
doesn't explain why he became the Earthman and sabotaged rockets."

"We have a good explanation of that," John Gordon said. "It goes back to
some time ago when selection of personnel for the projects began. Both
Frank Miller and Dick Earle were professionally qualified to be
electronics chief of Pegasus. But of course professional qualifications
aren't everything. Miller was not well liked. Earle was given the
assignment because it was thought he could do a better job of getting
along with the staff."

"And Miller resented it," Rick said.

"Yes. That was natural enough. But because of his warped personality, he
went from a natural reaction to a psychopathic one. He decided to take
revenge. We don't know why he decided to call himself the Earthman,
except that h