Edith studied her for a moment. “Twelve,” she said. “A difficult age for me. Better for you, I’m sure.”
Was it? Ada looked around the table at her father and her friends. They were her constant source of companionship, of knowledge, of camaraderie; each one offered to her some necessary part of her existence: Frank for kindness, and Liston for protection and love and common sense, and Hayato for artistry and humor. And the others, who could not make it: Charles-Robert for confidence and a sort of half-serious disdain for outsiders; Martha, the young secretary of the division, for knowledge of popular culture and fashion. And, above all others, David, for devotion and knowledge and loyalty and trust, David as the protector and guide of them all. But despite the completeness of what the adults around her offered to Ada, the sense of reassurance and comfort they extended, something was missing from her brief existence, and she knew, though she could not bring herself to fully form the thought, that it was friends her own age.
The dinner moved through salad and into dessert—Giordi had playfully kept his bib on well beyond the lobster course, insisting that he could not be trusted without one and that he would wear one regularly now—and Ada leapt up several times to refill the wine glasses of the guests. A fast-moving storm had swept through the neighborhood, and the house was finally cooling off. A damp breeze came in through the windows. They were near enough to the ocean to smell it, on nights like these. David invited everyone into the living room, and Ada stayed behind to clear the table.
When she had finished, she joined the group, and found that the guests had arranged themselves into little clusters. She hesitated for a while on the threshold of the living room, wiping her hands on the back of her shirt, and then joined Frank and Joonseong. In moments when it seemed appropriate, she produced some of the topics she had earlier bookmarked for discussion—a recent shooting in Mattapan; a French film from the 1950s that David had taken her to see at the Brattle; the restaurants surrounding the Bit, and their strengths and weaknesses—but she found herself increasingly distracted by David, who was standing slightly apart from any group, gazing at the floor. He had his hands clasped behind his back; he looked vaguely, unsettlingly lost. Ada nodded and feigned attentiveness as Joonseong told her about his new apartment, but in her peripheral vision she saw David walking slowly toward the window, as if lured there by a spell: he stood still then, and she saw his lips moving quickly, his hands hanging stiffly by his sides.
“David,” said Liston, who was closest to him. “Are you all right?” Ada saw her say it. And at this he lifted his head quickly, and smiled, and turned and clapped his hands once. Everyone looked at him.
“A riddle,” David announced, “for the newest members of the lab. And the first to solve it gets a prize.”
Ada heard a thickness in his voice that she didn’t recognize. She would have thought he was drunk, except that he rarely drank: a glass or two of wine was all he ever took, and tonight he’d barely had any at all. Together, everyone watched him.
This was his ritual: to each new crop of grad students, he delivered the same riddle, one he adored for its simplicity and the justice of its logic. All the permanent members of the lab could recite it and its answer in unison: they had all heard it so many times. Still, it comforted Ada somehow to hear him deliver it each year, as if it were scripture—to watch the same looks of thoughtfulness pass over the faces of the grad students, and then a lighting-up when one of them came upon the answer.
Everyone watched David expectantly: classmates observing a teacher. He cleared his throat and began. “You are a traveler who has come to a fork in the road between two villages,” he said. “The village of West is full of only murderous men incapable of telling the truth; visiting it will bring about your death. The village of East is full of benevolent men incapable of lying; visiting it will bring to you a cache of gold. Two men stand in the fork in the road—one from West and one from East. But you don’t know which is which. In order to determine how to reach the village full of gold, and avoid your certain doom, you may ask only one question of only one man. What should your question be?”
The grad students paused. One of them would ask David to repeat the problem: it happened every year. This year was Joonseong, and most likely it was due to his English, not to his logical abilities. David incanted the riddle once again, repeating it word for word. Edith was smiling about something Ada couldn’t determine, and at the end of David’s second recitation she put a hand out before her to signal that she had an announcement.
“I’m recusing myself. I know the answer because I’ve heard the puzzle before. I cannot tell a lie,” she said.
“I suppose that makes me an Easterner,” she added, and Giordi laughed too eagerly, or perhaps he was simply grateful to have understood her joke.
David then turned to Giordi and Joonseong, with some seriousness, and informed them that it was between the two of them, and reminded them of the prize. Both of them looked down at the floor contemplatively. Ada’s money was on Joonseong, from the way her father had described both men. But there was a silence over the room that went on for quite some time, and eventually both of them looked at one another and then at David. Joonseong raised his hands in surrender.
David looked pleased.
“Giving up, are you?” he asked them, giddily. “Even you, Giordi?” If David’s first love was being stumped, his second was stumping others.
David opened his mouth. Then he closed it.
“Your question must be,” David said. “Your question,” he said again.
He folded one arm about himself and put the other hand to his cheek. Everyone watched him. A slow unfurling sense of panic filled the room.
“My word,” said David, slowly. “I seem to have forgotten the answer.”
This was a moment that became sealed forever in Ada’s memory, encased in glass, a display in the museum of David’s decline. She never forgot the brief silence that followed, during which everyone looked down at the floor and then up again, or the way that Giordi loudly cleared his throat. Or the way that David looked at her, almost in horror: the look of a pilot who has just discovered that the engines of his plane have failed. The humiliation Ada felt on his behalf was almost too much to bear. At last, she let herself articulate in her mind the thought that she had been repressing for a year or more: that something was wrong with David.
“Oh, you know it, David,” Liston finally said. “My God, of course you do.” She looked around at the rest of the group entreatingly. “The traveler would point to either of the villagers and ask the other one, ‘Which way would he tell me to go to get to the cache of gold?’ And either man would say, ‘East.’ ”