It had to be a nightmare. In the middle of the night, in a bathroom lighted by a single bulb, with a travesty of humanity writhing on the floor, Howard could not believe that it had any reality.

Could it be a mutation that had somehow lived? Yet the thing had far more purpose, far more control of its body than any human infant. The baby slithered across the floor as Howard, in pain from the wounds on his body, watched in a panic of indecision. The baby reached the wall and cast a flipper onto it. The suction held, and the baby began to inch its way straight up the wall. As it climbed, it defecated, a thin drool of green tracing down the wall behind it. Howard looked at the slime following the infant up the wall, looked at the pus-covered sores on his arms.

What if the animal, whatever it was, did not die soon of its terrible deformity? What if it lived? What if it were found, taken to a hospital, cared for? What if it became an adult?

It reached the ceiling and made the turn, clinging tightly to the plaster, not falling off as it hung upside down and inched across toward the fight bulb.

The thing was trying to get directly over Howard, and the defecation was still dripping. Loathing overcame fear, and Howard reached up, took hold of the baby from the back, and, using his full weight, was finally able to pry it off the ceiling. It writhed and twisted in his hands, trying to get the suction-cups on him, but Howard resisted with all his strength and was able to get the baby, this time headfirst, into the toilet bowl. He held it there until the bubbles stopped and it was blue. Then he went back to his apartment for a knife. Whatever the creature was, it had to disappear from the face of the earth. It had to die, and there had to be no sign left that could hint that Howard had killed it.

He found the knife quickly, but paused for a few moments to put something on his wounds. They stung bitterly, but in a while they felt better. Howard took off his shirt; thought a moment and took off all his clothes, then put on his bathrobe and took a towel With him as he returned to the bathroom. He didn't want to get any blood on his clothes.

But when he got to the bathroom, the child was iaot in the toilet. Howard was alarmed. Had someone found it drowning? Had they, perhaps, seen him leaving the bathroom-- or worse, returning with his knife? He looked around the bathroom. There was nothing. He stepped back into the hall. No one. He stood a moment in the doorway, wondering what could have happened.

Then a weight dropped onto his head and shoulders from above, and he felt the suction flippers tugging at his face, at his head. He ahnost screamed. But he didn't want to arouse anyone. Somehow the child had not drowned after all, had crawled out of the toilet, and had waited over the door for Howard to return.

Once again the struggle resumed, and once again Howard pried the flippers away with the help of the toilet stall, though this time he was hampered by the fact that the child was behind and above him. It was exhausting work. He had to set down the knife so he could use both hands, and another dozen wounds stung bitterly by the time he had the child on the floor. As long as the child lay on its stomach, Howard could seize it from behind. He took it by the neck with one hand and picked up the knife with the other. He carried both to the toilet.

He had to flush twice to handle the flow of blood and pus. Howard wondered if the child was infected with some disease-- the white fluid was thick and at least as great in volume as the blood. Then he flushed seven more times to take the pieces of the creature down the drain. Even after death, the suction pads clung tightly to the porcelain; Howard pried them off with the knife.

Eventually, the child was completely gone. Howard was panting with the exertion, nauseated at the stench and horror of what he had done. He remembered the smell of his dog's guts after the car hit it, and he threw up everything he had eaten at the party. Got the party out of his system, felt cleaner; took a shower, felt cleaner still. When he was through, he made sure the bathroom showed no sign,of his ordeal.

Then he went to bed.

It wasn't easy to sleep. He was too keyed up. He couldn't take out of his mind the thought that he had committed murder (not murder, not murder, simply the elimination of something too foul to be alive). He tried thinking of a dozen, a hundred other things. Projects at work-- but the designs kept showing flippers. His children-- but their faces turned to the intense face of the struggling monster he had killed. Alice-- ah, but Alice was harder to think of than the creature.

At last he slept, and dreamed, and in his dream remembered his father, who had died when he was ten. Howard did not remember any of his standard reminiscences. No long walks with his father, no basketball in the driveway, no fishing trips. Those things had happened, but tonight, because of the struggle with the monster, Howard remembered darker things that he had long been able to keep hidden from himself.

"We can't afford to get you a ten-speed bike, Howie. Not until the strike is over."

"I know, Dad. You can't help it." Swallow bravely. "And I don't mind. When all the guys go riding around after school, I'll just stay home and get ahead on my homework."

"Lots of boys don't have ten-speed bikes, Howie."

Howie shrugged, and tumed away to hide the tears in his eyes. "Sure, lot of them. Hey, Dad, don't you worry about me. Howie can take care of himself."

Such courage. Such strength. He had got a ten-speed within a week. In his dream, Howard finally made a connection he had never been able to admit to himself before. His father had a rather elaborate ham radio setup in the garage. But about that time he had become tired of it, he said, and he sold it off and did a lot more work in the yard and looked bored as hell until the strike was over and he went back to work and got killed in an accident in the rolling mill.

Howard's dream ended madly, with him riding piggyback on his father's shoulders as the monster had ridden on him tonight-- and in his hand was a knife, and he was stabbing his father again and again in the throat.

He awoke in early morning light, before his alarm rang, sobbing weakly and whimpering, "I killed him, I killed him, I killed him."

And then he drifted upward out of sleep and saw the time. Six-thirty. "A dream," he said. And the dream had woken him early, too early, with a headache and sore eyes from crying. The pillow was soaked. "A hell of a lousy way to start the day," he mumbled. And, as was his habit, he got up and went to the window and opened the curtain.

On the glass, suction cups clinging tightly, was the child.

It was pressed close, as if by sucking very tightly it would be able to slither through the glass without breaking it. Far below were the honks of early morning traffic, the roar of passing trucks: but the child seemed oblivious to its height far above the street, with no ledge to break its fall. Indeed, there seemed little chance it would fall. The, eyes looked closely, piercingly at Howard.

Howard had been prepared to pretend that the night before had been another terribly realistic nightmare.

He stepped back from the glass, watched the child in fascination. It lifted a flipper, planted it higher, pulled itself up to a new position where it could stare at Howard eye to eye. And then, slowly and methodically, it began beating on the glass with its head.

The landlord was not generous with upkeep on the building. The glass with thin, and Howard knew that the child would not give up until it had broken through the glass so it could get to Howard.

He began to shake. His throat tightened. He was terribly afraid. Last night had been no dream. The fact that the child was here today was proof of that. Yet he had cut the child into small pieces. It could not possibly be alive. The glass shook and rattled with every blow the child's head struck.