Meanwhile he was terribly conscious of all the family celebrations that his father continued to miss: the day Anthony's first daughter started grade school, the afternoon the twins began swimming lessons, the evening Anthony's second daughter played "Chopsticks" at her first piano recital. Anthony was thirty-five before he knew it. Then forty All of a sudden, his children were in high school. His wife went to law school. He kept doing research.

When he was fifty-five and his eldest daughter turned thirty (she was married, with a daughter of her own), the laboratory made a mistake and released the information Anthony needed among a batch of old data that the lab felt was harmless. It wasn't Anthony who discovered the information, however, but instead a colleague two thousand miles away who had other reasons to look through the old data and recognized the significance of the type of rays that Anthony's father had been exposed to. Helped by his colleague's calculations, .Anthony devised a treatment, tested it on computer models, subjected rats to the same type of rays, found that they developed the same rapid symptoms as his father had, gave the animals the treatment, and felt his pulse quicken when the symptoms disappeared as rapidly as they had come on.With his wife next to him, Anthony stood outside his father's cryo-chamber as arrangements were made to thaw him. He feared that the technicians would make an error during the procedure (the word echoed from his youth), that his father wouldn't wake up.

His muscles tightened as something hissed and the door swung open. The hatch slid out.

Anthony's father looked the same as when he'd last seen him: naked, gaunt, and gray, suspended over a force field.

"You thawed him that quickly?" Anthony asked.

"It doesn't work if it isn't instantaneous."

His father's chest moved up and down.

"My G.o.d, he's alive," Anthony said. "He's actually . . ."

But there wasn't time to marvel. The disease would be active again, racing to complete its destruction.

Anthony hurriedly injected his father with the treatment. "We have to get him to a hospital."

He stayed in his father's room, constantly monitoring his father's condition, injecting new doses of the treatment precisely on schedule. To his amazement, his father improved almost at once. The healthier color of his skin made obvious what the blood tests confirmed-the disease was retreating.

Not that his father knew. One effect of being thawed was that the patient took several days to wake up. Anthony watched for a twitch of a finger, a flicker of an eyelid, to indicate that his father was regaining consciousness. After three days, he became worried enough to order another brain scan, but as his father was being put in the machine, a murmur made everyone stop.

". . . Where am I?" Anthony's father asked.

"In a hospital. You're going to be fine."

His father strained to focus on him. ". . . Who? . . ."

"Your son."

"No. . . . My son's ... a child." Looking frightened, Anthony's father lost consciousness.

The reaction wasn't unexpected. But Anthony had his own quite different reaction to deal with. While his father hadn't seen him age and hence didn't know who Anthony was, Anthony's father hadn't aged and hence looked exactly as Anthony remembered. The only problem was that Anthony's memory came from when he was nine, and now at the age of fifty-five, he looked at his thirty-two-year-old father, who wasn't much older than Anthony's son.

"Marian's dead?"

Anthony reluctantly nodded. "Yes. A car accident."

"When?"

Anthony had trouble saying it. "Twenty-two years ago."

"No."

"I'm afraid it's true."

"I've been frozen forty-six years'? No one told me what was going to happen."

"We couldn't. You were unconscious. Near death."

His father wept. "Sweet Jesus.""Our house?"

"Was sold a long time ago."

"My friends?"

Anthony looked away.

With a shudder, his father pressed his hands to his face. "It's worse than being dead."

"No," Anthony said. "You heard the psychiatrist. Depression's a normal part of coming back. You're going to have to learn to live again."

"Just like learning to walk again," his father said bitterly.

"Your muscles never had a chance to atrophy. As far as your body's concerned, no time pa.s.sed since you were frozen."

"But as far as my mind goes? Learn to live again? That's something n.o.body should have to do."

"Are you saying that Mom and I should have let you die? Our lives would have gone on just the same. Mom would have been killed whether you were frozen or you died.

Nothing would have changed, ex cept that you wouldn't be here now."

"With your mother gone . . ."

Anthony waited.

"With my son gone ..."

"I'm your son."

"My son had his ninth birthday two weeks ago. I gave him a new computer game that I looked forward to playing with him. I'll never get to see him grow up."

"To see me grow up. But I'm here now. We can make up for lost time."

"Lost time." The words seemed like dust in his father's mouth.

"Dad"-it was the last time Anthony used that term-"this is your grandson, Paul. These are your granddaughters Sally and Jane. And this is Jane's son, Peter. Your great-grandson."

Seeing his father's reaction to being introduced to grandchildren who were almost as old as he was, Anthony felt heartsick.

"Forty-six years? But everything changed in a second," his father said. "It makes my head spin so much ..."

"I'll teach you," Anthony said. "I'll start with basics and explain what happened since you were frozen. I'll move you forward. Look, here are virtual videos of-"

"What are virtual videos?"

"Of news shows from back then. We'll watch them in sequence. We'll talk about them.

Eventually, we'll get you up to the present."

Anthony's father pointed toward the startlingly lifelike images from forty-six years earlier.

"That's the present."

"Is there anything you'd like to do?"

"Go to Marian."

So Anthony drove him to the mausoleum, where his father stood for a long time in front of the niche that contained her urn.

"One instant she's alive. The next . . ." Tears filled his father's eyes. "Take me home."

But when Anthony headed north of the city, his father put a trembling hand on his shoulder."No. You're taking the wrong direction."

"But we live at-"

"Home. I want to go home."

So Anthony drove him back to the old neighborhood, where his father stared at the run-down house that he had once been proud to keep in perfect condition. Weeds filled the yard. Windows were broken. Porch steps were missing.

"There used to be a lawn here," Anthony's father said. "I worked so hard to keep it immaculate."

"I remember," Anthony said.

"I taught my son how to do somersaults on it."

"You taught me."

"In an instant." His father sounded anguished. "All gone in an instant."

Anthony peered up from his breakfast of black coffee, seeing his father at the entrance to the kitchen. It had been two days since they'd spoken.

"I wanted to tell you," his father said, "that I realize you made an enormous effort for me. I can only imagine the pain and sacrifice. I'm sorry if I'm . . . No matter how confused I feel, I want to thank you."

Anthony managed to smile, comparing the wrinkle-free face across from him to the weary one that he'd seen in the mirror that morning. "I'm sorry, too. That you're having such a hard adjustment. All Mom and I thought of was, you were so sick. We were ready to do anything that would help you."

"Your mother." Anthony's father needed a moment before he could continue. "Grief doesn't last just a couple of days."

It was Anthony's turn to need a moment. He nodded. "I've had much of my life to try to adjust to Mom being gone, but I still miss her. You'll have a long hard time catching up to me."

"I . . .".

"Yes?"

"I don't know what to do."

"For starters, why don't you let me make you some breakfast." Anthony's wife was defending a case in court. "It'll be just the two of us. Do waffles sound okay? There's some syrup in that cupboard. How about orange juice?"

The first thing Anthony's father did was learn how to drive the new types of vehicles.

Anthony believed this was a sign of improving mental health. But then he discovered that his father was using his mobility not to investigate his new world, but instead to visit Marian's ashes in the mausoleum and to go to the once-pristine house that he'd owned forty-six years previously, a time period that to him was yesterday. Anthony had done something similar when he'd lied to his mother's second husband about being at the library when actually he'd been at the cryofirm visiting his father. It worried him.

"I found a 'For Sale' sign at the house," his father said one evening at dinner. "I want to buy it."

"But. . ." Anthony set down his fork. "The place is a wreck."

"It won't be after I'm finished with it."Anthony felt as if he were arguing not with his father but with one of his children when they were determined to do something that he thought unwise.

"I can't stay here," his father said. "I can't live with you for the rest of my life."

"Why not? You're welcome."

"A father and his grown-up son? We'll get in each other's way."

"But we've gotten along so far."

"I want to buy the house."

Continuing to feel that he argued with his son, Anthony gave in as he always did. "All right, okay, fine. I'll help you get a loan. I'll help with the down payment. But if you're going to take on this kind of responsibility, you'll need a job."

"That's something else I want to talk to you about."

His father used his maintenance skills to become a successful contractor whose specialty was restoring old-style homes to their former beauty. Other contractors tried to compete, but Anthony's father had an edge: he knew those houses inside and out. He'd helped build them when he was a teenager working on summer construction jobs. He'd maintained his when that kind of house was in its prime, almost a half century earlier. Most important, he loved that old style of house.

One house in particular-the house where he'd started to raise his family. As soon as the renovation was completed, he found antique furniture from the period. When Anthony visited, he was amazed by how closely the house resembled the way it had looked when he was a child. His father had arranged to have Marian's urn released to him. It sat on a shelf in a study off the living room. Next to it were framed pictures of Anthony and his mother when they'd been young, the year Anthony's father had gotten sick.

His father found antique audio equipment from back then. The only songs he played were from that time. He even found an old computer and the game that he'd wanted to play with Anthony, teaching his great-grandson how to play it just as he'd already taught the little boy how to do somersaults on the lawn.

Anthony turned sixty. The hectic years of trying to save his father were behind him. He reduced his hours at the office. He followed an interest in gardening and taught himself to build a greenhouse. His father helped him.

"I need to ask you something," his father said one afternoon when the project was almost completed.

"You make it sound awfully serious."

His father looked down at his callused hands. "I have to ask your permission about something."

"Permission?" Anthony's frown deepened his wrinkles.

"Yes. I... It's been five years. I... Back then, you told me that I had to learn to live again."

"You've been doing a good job of it," Anthony said.

"I fought it for a long time." His father looked more uncomfortable.

"What's wrong?"

"I don't know how to ..."