Jason Allison, Junior, was listed on the directory of the Terran HQ as "Suite 1214, Medical Residence Corridor." I found the rooms without any trouble, though an elderly doctor stared at me rather curiously as I barged along the quiet hallway. The suite—bedroom, minuscule sitting-room, compact bath—depressed me; clean, closed-in and neutral as the man who owned them, I rummaged them restlessly, trying to find some scrap of familiarity to indicate that I had lived here for the past eleven years.

Jay Allison was thirty-four years old. I had given my age, without hesitation, as 22. There were no obvious blanks in my memory; from the moment Jay Allison had spoken of the trailmen, my past had rushed back and stood, complete to yesterday's supper (only had I eaten that supper twelve years ago)? I remembered my father, a lined silent man who had liked to fly solitary, taking photograph after photograph from his plane for the meticulous work of Mapping and Exploration. He'd liked to have me fly with him and I'd flown over virtually every inch of the planet. No one else had ever dared fly over the Hellers, except the big commercial spacecraft that kept to a safe altitude. I vaguely remembered the crash and the strange hands pulling me out of the wreckage and the weeks I'd spent, broken-bodied and delirious, gently tended by one of the red-eyed, twittering women of the trailmen. In all I had spent eight years in the Nest, which was not a nest at all but a vast sprawling city built in the branches of enormous trees. With the small and delicate humanoids who had been my playfellows, I had gathered the nuts and buds and trapped the small arboreal animals they used for food, taken my share at weaving clothing from the fibres of parasite plants cultivated on the stems, and in all those eight years I had set foot on the ground less than a dozen times, even though I had travelled for miles through the tree-roads high above the forest floor.

Then the Old-One's painful decision that I was too alien for them, and the difficult and dangerous journey my trailmen foster-parents and foster-brothers had undertaken, to help me out of the Hellers and arrange for me to be taken to the Trade City. After two years of physically painful and mentally rebellious readjustment to daytime living, the owl-eyed trailmen saw best, and lived largely, by moonlight, I had found a niche for myself, and settled down. But all of the later years (after Jay Allison had taken over, I supposed, from a basic pattern of memory common to both of us) had vanished into the limbo of the subconscious.

A bookrack was crammed with large microcards; I slipped one into the viewer, with a queer sense of spying, and found myself listening apprehensively to hear that measured step and Jay Allison's falsetto voice demanding what the hell I was doing, meddling with his possessions. Eye to the viewer, I read briefly at random, something about the management of compound fracture, then realized I had understood exactly three words in a paragraph. I put my fist against my forehead and heard the words echoing there emptily; "laceration ... primary efflusion ... serum and lymph ... granulation tissue...." I presumed that the words meant something and that I once had known what. But if I had a medical education, I didn't recall a syllable of it. I didn't know a fracture from a fraction.

In a sudden frenzy of impatience I stripped off the white coat and put on the first shirt I came to, a crimson thing that hung in the line of white coats like an exotic bird in snow country. I went back to rummaging the drawers and bureaus. Carelessly shoved in a pigeonhole I found another microcard that looked familiar; and when I slipped it mechanically into the viewer it turned out to be a book on mountaineering which, oddly enough, I remembered buying as a youngster. It dispelled my last, lingering doubts. Evidently I had bought it before the personalities had forked so sharply apart and separated, Jason from Jay. I was beginning to believe. Not to accept. Just to believe it had happened. The book looked well-thumbed, and had been handled so much I had to baby it into the slot of the viewer.

Under a folded pile of clean underwear I found a flat half-empty bottle of whiskey. I remembered Forth's words that he'd never seen Jay Allison drink, and suddenly I thought, "The fool!" I fixed myself a drink and sat down, idly scanning over the mountaineering book.


Not till I'd entered medical school, I suspected, did the two halves of me fork so strongly apart ... so strongly that there had been days and weeks and, I suspected, years where Jay Allison had kept me prisoner. I tried to juggle dates in my mind, looked at a calendar, and got such a mental jolt that I put it face-down to think about when I was a little drunker.

I wondered if my detailed memories of my teens and early twenties were the same memories Jay Allison looked back on. I didn't think so. People forget and remember selectively. Week by week, then, and year by year, the dominant personality of Jay had crowded me out; so that the young rowdy, more than half Darkovan, loving the mountains, half-homesick for a non-human world, had been drowned in the chilly, austere young medical student who lost himself in his work. But I, Jason—I had always been the watcher behind, the person Jay Allison dared not be? Why was he past thirty—and I just 22?

A ringing shattered the silence; I had to hunt for the intercom on the bedroom wall. I said, "Who is it?" and an unfamiliar voice demanded, "Dr. Allison?"