t be persuaded. The worst part would be getting there. The
plane, or the 'copter, isn't built that can get through the crosswinds
around the Hellers and land inside them. We'd have to go on foot, all
the way from Carthon. I'd need professional climbers--mountaineers."

"Then you don't share Allison's attitude?"

"Dammit, don't insult me!" I discovered that I was on my feet again,
pacing the office restlessly. Forth stared and mused aloud, "What's
personality anyway? A mask of emotions, superimposed on the body and the
intellect. Change the point of view, change the emotions and desires,
and even with the same body and the same past experiences, you have a
new man."

I swung round in mid-step. A new and terrible suspicion, too monstrous
to name, was creeping up on me. Forth touched a button and the face of
Jay Allison, immobile, appeared on the visionscreen. Forth put a mirror
in my hand. He said, "Jason Allison, look at yourself."

I looked.

"No," I said. And again, "No. No. No."

* * * * *

Forth didn't argue. He pointed, with a stubby finger. "Look--" he moved
the finger as he spoke, "height of forehead. Set of cheekbones. Your
eyebrows look different, and your mouth, because the expression is
different. But bony structure--the nose, the chin--"

I heard myself make a queer sound; dashed the mirror to the floor. He
grabbed my forearm. "Steady, man!"

I found a scrap of my voice. It didn't sound like Allison's. "Then
I'm--Jay_{2}? Jay Allison with amnesia?"

"Not exactly." Forth mopped his forehead with an immaculate sleeve and
it came away damp with sweat, "No--_not_ Jay Allison as I know him!" He
drew a long breath. "And sit down. Whoever you are, sit _down_!"

I sat. Gingerly. Not sure.

"But the man Jay might have been, given a different temperamental bias.
I'd say--the man Jay Allison started out to be. The man he _refused_ to
be. Within his subconscious, he built up barriers against a whole series
of memories, and the subliminal threshold--"

"Doc, I don't understand the psycho talk."

Forth stared. "And you do remember the trailmen's language. I thought
so. Allison's personality is suppressed in you, as yours was in him."

"One thing, Doc. I don't know a thing about blood fractions or
epidemics. My half of the personality didn't study medicine." I took up
the mirror again and broodingly studied the face there. The high thin
cheeks, high forehead shaded by coarse