The rest of the vacation passed much too quickly. The subject of the organization did not come up again; but, perhaps as compensation, the adjoining door was not closed. At last, late on the seventh day, Barrent and Moera returned to Tetrahyde.

"When can I see you again?" Barrent asked.

"I'll get in touch with you."

"That's not a very satisfactory arrangement."

"It's the best I can do," Moera said. "I'm sorry, Will. I'll see what I can do about the organization."

Barrent had to be satisfied with that. When the vehicle dropped him at his store, he still didn't know where she lived, or what kind of an organization she represented.

Back in his apartment, he considered carefully the details of his dream in the Dream Shop. It was all there: his anger at Therkaler, the illicit weapon, the encounter, the corpse, and then the informer and the judge. Only one thing was missing. He had no recollection of the actual murder, no memory of aiming the weapon and activating it. The dream stopped when he met Therkaler, and started again after he was dead.

Perhaps he had blocked the moment of actual murder out of his mind; but perhaps there had been some provocation, some satisfactory reason why he had killed the man. He would have to find out.

There were only two ways of getting information about Earth. One lay through the horror-tinged visions of the Dream Shop, and he was determined not to go there again. The other way was through the services of a skrenning mutant.

Barrent had the usual distaste for mutants. They were another race entirely, and their status of untouchability was no mere prejudice. It was well known that mutants often carried strange and incurable diseases. They were shunned, and they had reacted to exclusion by exclusiveness. They lived in the Mutant Quarter, which was almost a self-contained city within Tetrahyde. Citizens with good sense stayed away from the Quarter, especially after dark; everyone knew that mutants could be vindictive.

But only mutants had the skrenning ability. In their misshapen bodies were unusual powers and talents, odd and abnormal abilities which the normal man shunned by day but secretly courted by night. Mutants were said to be in the particular favor of The Black One. Some people felt that the great art of Black Magic, about which the priests boasted, could only be performed by a mutant; but one never said so in the presence of a priest.

Mutants, because of their strange talents, were reputed to remember much more of Earth than was possible for normal men and women. Not only could they remember Earth in general, but in particular they could skren the life-thread of a man backward through space and time, pierce the wall of forgetfulness and tell what really had happened to him.

Other people believed that mutants had no unusual abilities at all. They considered them clever rogues who lived off people's credulity.

Barrent decided to find out for himself. Late one night, suitably cloaked and armed, he left his apartment and went to the Mutant Quarter.

Barrent walked through the narrow, twisting streets of the Quarter, one hand never far from his weapon. He walked among the lame and the blind, past hydrocephaloid and microcephalous idiots, past a juggler who kept twelve flaming torches in the air with the aid of a rudimentary third hand growing out of his chest. There were vendors selling clothing, charms, and jewelry. There were carts loaded with pungent and unsanitary-looking food. He walked past a row of brightly painted brothels. Girls crowded the windows and shrieked at him, and a four-armed, six-legged woman told him he was just in time for the Delphian Rites. Barrent turned away from her and almost ran into a monstrously fat woman who pulled open her blouse to reveal eight shrunken breasts. He ducked around her, moving quickly past four linked Siamese quadruplets who stared at him with huge mournful eyes.

Barrent turned a corner and stopped. A tall, ragged old man with a cane was blocking his way. The man was half-blind; the skin had grown smooth and hairless over the socket where his left eye should have been. But his right eye was sharp and fierce under a white eyebrow.

"You wish the services of a genuine skrenner?" the old man asked.

Barrent nodded.

"Follow me," the mutant said. He turned into an alley, and Barrent came after him, gripping the butt of his needlebeam tightly. Mutants were forbidden by law to carry arms; but like this old man, most of them had heavy, iron-headed walking sticks. At close quarters, no one could ask for a better weapon.

The old man opened a door and motioned Barrent inside. Barrent paused, thinking about the stories he had heard of gullible citizens falling into mutant hands. Then he half-drew his needlebeam and went inside.

At the end of a long passageway, the old man opened a door and led Barrent into a small, dimly lighted room. As his eyes became accustomed to the dark, Barrent could make out the shapes of two women sitting in front of a plain wooden table. There was a pan of water on the table, and in the pan was a fist-sized piece of glass cut into many facets.

One of the women was very old and completely hairless. The other was young and beautiful. As Barrent moved closer to the table, he saw, with a sense of shock, that her legs were joined below the knee by a membrane of scaly skin, and her feet were of a rudimentary fish-tail shape.

"What do you wish us to skren for you, Citizen Barrent?" the young woman asked.

"How did you know my name?" Barrent asked. When he got no answer, he said, "All right. I want to find out about a murder I committed on Earth."

"Why do you want to find out about it?" the young woman asked. "Won't the authorities credit it to your record?"

"They credit it. But I want to find out why I did it. Maybe there were extenuating circumstances. Maybe I did it in self-defense."

"Is it really important?" the young woman asked.

"I think so," Barrent said. He hesitated a moment, then took the plunge. "The fact of the matter is, I have a neurotic prejudice against murder. I would rather not kill. So I want to find out why I committed murder on Earth."

The mutants looked at each other. Then the old man grinned and said, "Citizen, we'll help you all we can. We mutants also have a prejudice against killing, since it's always someone else killing us. We're all in favor of citizens with a neurosis against murder."

"Then you'll skren my past?"

"It's not as easy as that," the young woman said. "The skrenning ability, which is one of a cluster of psi talents, is difficult to use. It doesn't always function. And when it does function, it often doesn't reveal what it's supposed to."

"I thought all mutants could look into the past whenever they wanted to," Barrent said.

"No," the old man told him, "that isn't true. For one thing, not all of us who are classified mutants are true mutants. Almost any deformity or abnormality these days is called mutantism. It's a handy term to cover anyone who doesn't conform to the Terran standard of appearance."

"But some of you are true mutants?"

"Certainly. But even then, there are different types of mutantism. Some just show radiation abnormalities — giantism, microcephaly, and the like. Only a few of us possess the slightest psi abilities — although all mutants claim them."

"Are you able to skren?" Barrent asked him.

"No. But Myla can," he said, pointing to the young woman. "Sometimes she can."

The young woman was staring into the pan of water, into the faceted glass. Her pale eyes were open very wide, showing almost all pupil, and her fish-tailed body was rigidly upright, supported by the old woman.

"She's beginning to see something," the man said. "The water and the glass are just devices to focus her attention. Myla's good at skrenning, though sometimes she gets the future confused with the past. That sort of thing is embarrassing, and it gives skrenning a bad name. It can't be helped, though. Every once in a while the future is there in the water, and Myla has to tell what she sees. Last week she told a Hadji he was going to die in four days." The old man chuckled. "You should have seen the expression on his face."