Three hundred years ago, he thought. A spacecraft three hundred years old. But the space program wasn’t three hundred years old. It was barely thirty years old. So how could a spacecraft be three hundred years old? It couldn’t be. Barnes must be mistaken. But how could Barnes be mistaken? The Navy wouldn’t send all these ships, all these people, unless they were sure what was down there. A spacecraft three hundred years old.

But how could that be? It couldn’t be. It must be something else. He went over it again and again, getting nowhere, his mind dazed and shocked.

“-solutely no question about it,” Barnes was saying. “We can estimate the date from coral growth with great accuracy. Pacific coral grows two-and-a-half centimeters a year, and the object-whatever it is-is covered in about five meters of coral. That’s a lot of coral. Of course, coral doesn’t grow at a depth of a thousand feet, which means that the present shelf collapsed to a lower depth at some point in the past. The geologists are telling us that happened about a century ago, so we’re assuming a total age for the craft of about three hundred years. But we could be wrong about that. It could, in fact, be much older. It could be a thousand years old.”

Barnes shifted papers on his desk again, arranging them into neat stacks, lining up the edges.

“I don’t mind telling you, Dr. Johnson, this thing scares the hell out of me. That’s why you’re here.”

Norman shook his head. “I still don’t understand.”

“We brought you here,” Barnes said, “because of your association with the ULF project.”

“ULF?” Norman said. And he almost added, But ULF was a joke. Seeing how serious Barnes was, he was glad he had caught himself in time.

Yet ulf was a joke. Everything about it had been a joke, from the very beginning.

In 1979, in the waning days of the Carter Administration, Norman Johnson had been an assistant professor of psychology at the University of California at San Diego; his particular research interest was group dynamics and anxiety, and he occasionally served on FAA crash-site teams.