But now, Wexler said, the data came in torrents. Too, the Virginia team had begun serious work with what they called “the human interface”—mostly convicts recruited out of Vacaville. This was not hard data; it was “of dubious provenance” and sometimes contradictory. But much of it correlated with the new translations from the big mainframes. A preliminary understanding of the Exotics began to emerge.

“The question had always been, why do we have these artifacts? Why were they buried in the Mato Grosso? Were they a gift, an accident? The great mystery.”

Byron said, “Is there an answer?”

“Hints,” Wexler said. He leaned forward now. His own fascination was obvious and undimmed. “We deciphered a little of their history. The history, especially, of their information technology.”

“I don’t understand,” Byron said.

“Well…” Wexler paused to catch his breath. “First there are the stories around the fire. Neolithic data storage. The past is recorded, but it’s not very efficient. Errors creep in. Then the written word. The beginning of real history—

a better grip on the past. Compared to oral history it’s a fairly dense medium, fairly incorruptible. Then the printed word, the book. Better yet. Photography, audiotape, videotape… and suddenly the past is very much with us. We have digital technology, we have molecular memory. We have people like you.” He looked a moment at Byron’s faded Angel tattoo. “Walking data storage. The Exotics were like us in this respect, but more focused… you might say obsessed. The idea of the loss of the past terrified them. They had a profound, ontological fear of forgetting. Without memory, no meaning; without meaning—chaos.” He sat back. “The oneiroliths are the logical product of that obsession: complexly folded in spacetime, linked somehow directly into sapient consciousness. You could say that they contain a sort of recording of experience itself, an archive of every human life since they arrived on this planet. Better perhaps to say that they allow us access to the experience of the past—the only kind of time machine we are ever likely to have.”

Well, Byron thought. He had seen Teresa do her trick with the old people who visited her float: pulling the past out of a stone. Strange but not world-shaking. He told Wexler so.

“But it begs the question,” Wexler said. “Our best estimate now is that the Exotics encountered our planet some thousand years before the birth of Christ. It fascinated them. It must have. They would have asked themselves the questions we’ve been asking about them: how are these creatures like us? How are they not?”

He sipped his coffee, momentarily breathless. Byron waited.

“My guess,” Wexler said, “is that they considered us defective. Suppose we traveled to another world and encountered a race of myopics. That’s how it must have seemed to them. Here we are, obviously sapient, tool-using, clever individuals. Our bodies are not unlike theirs; we have opposable thumbs, as they do. The distinguishing feature is …” He tapped his forehead. “Memory.” He smiled faintly. “The best evidence now suggests that the Exotics possessed what we would call eidetic memory. A human mind can’t do this; the few cases of human mnemonism on record have been deeply disturbed individuals. It’s the way we’re wired. We have to assume the Exotics could forget, in the sense that the past was not always vividly in their mind—no living creature could cope with that. But there was no fully experienced moment that could not be recalled at will… or could be willfully or permanently suppressed. Presumably, this is what fueled their obsession with information technology. For them, the idea of forgetting was indistinguishable from the idea of death. To pass out of memory was to pass out of the world. To conserve memory was to confer immortality.”

Byron walked with Wexler out along the seawall for a distance.

It was more private out here. The ocean seemed to lend a credibility to all this talk of time, immortality, memory.

Byron believed most of it. The talk had ignited an old enthusiasm in Wexler’s lined face, too immediate to be faked. None of this addressed the problem of betrayal, money, Teresa. But he was content, for now, to let the man talk.

“I wanted one of these new stones, of course. It seemed to me we could do so much with it. They used human subjects in Virginia, but usually the criminally insane, and they were reacting badly to the experience—hypermnesia, specifically of repressed material. Whereas in Carmel the response was almost always positive … at least with the traditional ’liths. Why not these new ones? It would be bigger, stronger, better. Real contact this time. Contact with an alien sapience: I cannot communicate how intoxicating that idea was. Not the exchange of mathematics, but real contact—spiritual contact.”

Byron said coolly, “Spiritual?”

The faint smile again. “I used to be freer with words like that. But yes, spiritual. It was what we wanted. The authentic touch. Across that chasm.” He waved his hand at the sky. “But of course everything was locked up very tight. The Agencies were scared of this whole thing. For the last thirty years national governments have been presiding over some fairly tumultuous social changes. A direct product of the oneiroliths. Fortunes made and unmade. That kind of instability is frightening. The idea of accelerated change—well, it made them nervous.”

“So you set up the buy at Pau Seco.”

“I really believed it would be safe. I spent a considerable amount of money on it. I bought cooperation at the highest levels of the SUDAM bureaucracy. There was a risk involved, of course. I told Teresa so when she volunteered. But even if there had been legal trouble, I might have bought you out of that too … the Valverde regime is extremely pliable.”

“It was worse than that,” Byron said.

Wexler averted his eyes. “So I understand. My contact in Virginia was compromised. And then the estate at Carmel was compromised. And so the house of cards came tumbling down. I have no influence over the Agencies … I didn’t know they would be involved.” He looked at Byron. “You managed to get away with the stone?”

“Yes.” No point in hiding it now.

“You have it still?”

He nodded.

“Has Teresa used it?”

“Yes.”

“Her reaction was not positive?”

“No,” Byron said.

Wexler nodded, registering the information. He looked back at the sea. The sea was wide and deep, Byron thought, and it went on forever. Like the sky. Like the stars.

“I don’t think they wholly understood us,” Wexler said. “The Exotics, I mean. They gave us the stones, and they were a gift, hidden until we could usefully decode and reproduce them. Binary code propagating across axes of symmetry. Micro voltages trickling down folded spacetime. But with this other aspect…” He smiled again—sadly now, Byron thought. “ ‘Spiritual.’ I think they simply wanted to make us whole … to cure what they saw as our tragic failure. Failure of memory. Which is failure of conscience. They were surprised, I would guess, by our capacity for aggression. For ruthlessness, for inflicting pain. Conscience is memory… and the stones would restore it.”

“But it doesn’t work that way.”

“I think because we are divided against ourselves in a way they could not imagine. We suppress memories; the memories lead a life of their own. We create images of ourselves and the images spring to life. We have names for them. The conscious and unconscious mind. Id and ego. And so on. Always, the crucial act is the act of forgetting. To be forced to confront the past, really confront it…” He shook his head. “It would take a great strength.”

“I’m worried about her,” Byron said.

Wexler said quietly, “I can’t help you.”