She counted down from one hundred by sevens. It made her feel good to do this. There were mishaps now and then. Odd numbers were tricky, like some rough tumble through space, resisting the easy run of what is divisible by two. That’s why they wanted her to count down by sevens, to make it not so easy. She could descend into the single digits most times without a stumble. The most anxious transition was twenty-three to sixteen. She wanted to say seventeen. She was always on the verge of going from thirty-seven to thirty to twenty-three to seventeen. The odd number asserting itself. At the medical center the doctor smiled at the error, or didn’t notice, or was looking at a printout of test results. She was troubled by memory lapses, steeped in family history. She was also fine. Brain normal for age. She was forty-one years old and within the limited protocols of the imaging process, pretty much everything seemed to be unremarkable. The ventricles were unremarkable, the brainstem and cerebellum, base of skull, cavernous sinus regions, pituitary gland. All unremarkable.

She took the tests and examination, did the MRI, did the psychometrics, did word pairing, recall, concentration, walked a straight line wall to wall, counted down from one hundred by sevens.

It made her feel good, the counting down, and she did it sometimes in the day’s familiar drift, walking down a street, riding in a taxi. It was her form of lyric verse, subjective and unrhymed, a little songlike but with a rigor, a tradition of fixed order, only backwards, to test the presence of another kind of reversal, which a doctor nicely named retrogenesis.

At the Race amp; Sports Book, downtown, in the old casino, there were five rows of long tables set at graded levels. He sat at the far end of the last table in the top row, facing front, with five screens high on the wall ahead showing horses running in various time zones somewhere on the planet. A man read a paperback book at the table directly below him, cigarette burning down in his hand. Across the room at the lowest level a large woman in a hooded sweatshirt sat before an array of newspapers. He knew it was a woman because the hood was not raised and would have known anyway, somehow, through gesture or posture, the way she spread pages before her and used both hands to smooth them out and then nudged other pages out of reading range, in the wan light and hanging smoke.

The casino spread behind him and to either side, acres of neon slots, mostly empty now of human pulse. He felt hemmed in all the same, enclosed by the dimness and low ceiling and by the thick residue of smoke that adhered to his skin and carried decades of crowds and action.

It was eight a.m. and he was the only person who knew this. He glanced toward the far end of the adjacent table, where an old man with a white ponytail sat bent across the arm of his chair, watching horses in midrace and showing the anxious lean of body english that marks money on the line. He was otherwise motionless. The lean was all there was and then the voice of the track announcer, rapid-fire, the one mild excitement: Yankee Gal coming through on the inside.

There was no one else at the tables here. Races ended, others began, or they were the same races replayed on one or more of the screens. He wasn’t watching closely. There were flutters of action from another set of screens, recessed at a lower level, above the cashier’s cage. He watched the cigarette burn down in the hand of the man reading the book, just below him. He checked his watch again. He knew time and day of week and wondered when such scraps of data would begin to feel disposable.

The ponytailed man got up and left in the final furlong of a race in progress, curling his newspaper into a tight fold and snapping it on his thigh. The whole place stank of abandonment. In time Keith got up and walked over to the poker room, where he completed his buy-in and took his seat, ready for the start of the tournament, so-called.

Only three tables were occupied. In about the seventy-seventh game of hold ’em, he began to sense a life in all this, not for himself but the others, a small dawn of tunneled meaning. He watched the blinking woman across the table. She was thin, wrinkled, hard to see, right there, five feet away, hair going gray. He didn’t wonder who she was or where she’d go when this was over, to what sort of room somewhere, to think what kind of thoughts. This was never over. That was the point. There was nothing outside the game but faded space. She blinked and called, blinked and folded.

In the casino distance, the announcer’s smoky voice, in replay. Yankee Gal was coming through on the inside.

She missed those nights with friends when you talk about everything. She hadn’t stayed in close touch and felt no guilt or need. There were hours of talk and laughter, bottles uncorked. She missed the comical midlife monologues of the clinically self-absorbed. The food ran out, the wine did not, and who was the little man in the red cravat who did sound effects from old submarine movies. She went out only rarely now, went alone, did not stay late. She missed the autumn weekends at somebody’s country house, leaf-fall and touch football, kids tumbling down grassy slopes, leaders and followers, all watched by a pair of tall slender dogs poised on their haunches like figures in myth.

She didn’t feel the old attraction, the thing looked forward to. It was also a question of thinking of Keith. He would not want to do it. He’d never felt right in these surroundings and it would be impossible now for him to feel any different. People have trouble approaching him on the simplest social level. They think they will bounce off. They will hit a wall and bounce.

Her mother, this is what she missed. Nina was all around her now but only in the meditative air, her face and breath, an attending presence somewhere near.

After the memorial service, four months earlier, a small group went for a late lunch. Martin had flown in from somewhere, as usual, in Europe, and there were two of her mother’s former colleagues.

It was a quiet hour and a half, with stories of Nina and other matters, the work they were doing, the places they’d lately been. The woman, a biographer, ate sparingly, spoke at some length. The man said nearly nothing. He was director of a library of art and architecture.

The afternoon was fading away, over coffee. Then Martin said, “We’re all sick of America and Americans. The subject nauseates us.”

He and Nina had seen each other only rarely in the last two and a half years of her life. Each heard news of the other through mutual friends or from Lianne, who stayed in touch with Martin, sporadically, through e-mails and phone calls.

“But I’ll tell you something,” he said.

She looked at him. He had the same thirteen-day beard, the drooping lids of chronic jet lag. He wore the standard unpressed suit, his uniform, shirt looking slept-in, no tie. Someone displaced or deeply distracted, lost in time. But he was heavier now, his face went east and west, there were signs of bloat and sag that the beard could not conceal. He had the pressured look of a man whose eyes have gone smaller in his head.

“For all the careless power of this country, let me say this, for all the danger it makes in the world, America is going to become irrelevant. Do you believe this?”

She wasn’t sure why she’d stayed in touch with him. The disincentives were strong. There was what she knew about him, even if incomplete, and there was, more tellingly, how her mother had come to feel about him. It was guilt by association, his, when the towers fell.

“There is a word in German. Gedankenübertragung. This is the broadcasting of thoughts. We are all beginning to have this thought, of American irrelevance. It’s a little like telepathy. Soon the day is coming when nobody has to think about America except for the danger it brings. It is losing the center. It becomes the center of its own shit. This is the only center it occupies.”