those steel-enforced concrete walls, even the men upon whose bodies the experiments were being performed. It was because of those experiments performed on him that Seligman was here now, alone. Because of the myopic little men with their foreign accents and their clippings of skin from his buttocks and shoulders, the bacteriologists and the endocrine specialists, the epidermis men and the blood-stream inspectors—because of all of them—he was here now, when no one else had lived. Seligman rubbed his forehead at the base of the hairline. Why had he lived? Was it some strain of rare origin running through his body that had allowed him to stand the effects of the bombs? Was it a combination of the experiments performed on him—and only in a certain way on him, for none of the other twenty-two had lived—and the radiation? He gave up, for the millionth time. Had he been a student of the ills of man he might have ventured a guess, but it was too far afield for a common foot-soldier. All that counted was that when he had awakened, pinned thighs, chest and arms under the masonry of a building in Salt Lake City, he was alive and could see. He could see, that is, till the tears clouded the vision of his own sick green glow. It was life. But at times like this, with the flickering light of his passage marked on the ash-littered remains of his culture, he wondered if it was worth the agony. He never really approached madness, for the shock of realizing he was totally and finally alone, without a voice or a face or a touch in all the world, overrode the smaller shock of his transformation. He lived. He was that fabled, joked-about Last Man On Earth. But it wasn't a joke now. Nor had the months after the final dust of extinction settled across the planet been a joke. Those months had labored past as he searched the country, taking what little food was still sealed from radiation—though why radiation should bother him he could not imagine; habit more than anything—and disease, racing from one end of the continent in search of but one other human to share his torment. But of course there had been no one. He was cut off like a withered arm from the body that was his race. Not only was he alone, and with the double terror of an aura that never dimmed, sending the word, "Freak!" pounding through his mind, but there were other changes, equally terrifying. It had been in