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—Jay2? 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!"
"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 dark hair which Jay Allison had slicked down now heavily rumpled. I still didn't think I looked anything like the doctor. Our voices were nothing alike either; his had been pitched rather high, falsetto. My own, as nearly as I could judge, was a full octave deeper, and more resonant. Yet they issued from the same vocal chords, unless Forth was having a reasonless, macabre joke.