She got to eat free at work, she said.

Well, gosh, that was great, but he sure didn’t expect her to give him the same deal.

“No,” she said. “The manager is really strict, always looking out for girls who gave freebies to their…friends.”

“Boyfriends?” he asked, and she blushed. “Do you have a boyfriend?”

She considered the question, which struck him as odd. Seemed a clear yes-or-no proposition to him. Maybe she had a boyfriend who didn’t satisfy her. Maybe she was thinking about breaking up with him but was tenderhearted, didn’t want to hurt his feelings. What a nice girl she was.

“Anyway,” she said, not answering him either way, “it’s only ice cream, no burgers or hot dogs or even pizza. We had hot pretzels for a while, but no one wanted them and-”

Then maybe they could stop at this little place he knew, by a stream? There was a metal stand, kind of like an old-fashioned trailer, and it made the best steak sandwiches. There was no such place, not nearby, but Walter had heard a gentleman at the shop describe the steak sandwiches he had eaten in his youth, back in Wisconsin.

Walter got lost, looking for the steak shack that wasn’t, driving deeper and deeper into what turned out to be a state park. He made conversation, asked again if she had a boyfriend. She hemmed and hawed but finally said no. Good, he wouldn’t like a girl who would cheat on her boyfriend. She was getting nervous, her eyes skating back and forth, but he promised her that she would be on time for work. He told her he was surprised that a girl as pretty as she was didn’t have a boyfriend. He could tell she liked hearing that, yet she continued to hug the door a little. The road ran out and he parked, told her that he had screwed up, the steak place was on the other side of the creek, but they could cross it and be there in five minutes, if she would just take his hand. Once he had his hand in hers, he tickled the palm with his middle finger, a trick he had heard from Earl, before Earl ran off and joined the Marines. It was a signal and, if the girl liked you, she tickled back. Or maybe if she just didn’t jerk her hand away, he decided, that was proof enough that she was up for things.

He tried to take it slow, but she kept talking about work, fretting about being late, and then she started to cry. She cried harder when he kissed her, and he was pretty sure he was a good kisser. She cried so hard that snot ran out of her nose, which was gross, and he stopped kissing her.

“I guess you don’t want to be my girlfriend, then,” he said. She kept crying. Why were girls so contrary? Of course, he lived pretty far away. They wouldn’t be able to see each other except on his days off. But she should be flattered, this girl who no one else had claimed, that a man, a nice-looking man, wanted her. A man who would please her, if she would allow herself to be pleased.

“Are you going to tell?” he asked.

She said she wouldn’t, and he wished he could believe her. He didn’t, though. So he did what he had to do. He was tamping down the hole he dug when he saw the other girl coming. How much had she seen? Anything, everything? He thought fast, told her how to cross the stream. He held his hands out to her, and she didn’t hesitate. Her hands felt cool and smooth against his, which were burning with new calluses from the digging. If anyone should have wanted to let go, it should have been him. It hurt, holding her hands. He studied her face. He wished women didn’t lie so much, that there was a way to ask if she had seen anything without giving away that there had been something to see. It was like that old riddle, the one about the island with just two Indians, one who always lies and one who always tells the truth, but there’s one question that will set things straight. Only he could never remember what the question was. Something like: If I ask your brother, will he tell me the truth? No, that wasn’t it, because both would say no. What should he ask her? But he had taken too long, held her hands too roughly, and given himself away.

“You’re with me now,” he said, buckling her into the seat next to his, then tying her hands at the wrists with a rope from the bed of the pickup.

Then, as an afterthought: “What’s your name?”

SHE DECIDED TO WRITE WALTER a letter, nothing more. That’s the way she characterized her decision, when she spoke of it to Peter and her parents. “I’m going to write him a letter,” she said, “nothing more.” A letter would be private, final. (Although she supposed his mail was read by prison officials. Again, there was the worrying detail of his confidante, the person who had written the letter on his behalf, but she didn’t want to write him in care of that PO box in Baltimore.) A letter seemed the best way to go if she wanted to keep this matter contained.

Yet whenever she sat down at Peter’s home computer, trying to use those oddments of minutes at a mother’s disposal, she ended up second-guessing herself. A letter wasn’t a small thing, not these days. Even when she lived in London, she hadn’t written letters. Trans-Atlantic calls weren’t that expensive, and e-mails were always handy for rushed bulletins, or sharing the details of their visits home. Eliza couldn’t remember the last time she had written a letter, and Walter’s was the first real one she had received in years, probably since Vonnie switched to computers for those furious missives about how everyone in the family had disappointed her, a brief mania during her early thirties, when she was under the sway of a disreputable therapist, possibly her lover. But how else did one communicate with a man in prison?

Eliza smiled in spite of herself, thinking how this question would fit nicely on the running list she and Peter kept, “Things We Never Expected to Say.” They had been keeping this since their college days, almost since the day they met, and it was actually a list of things they had overheard: The bouillabaisse is dank. I left my poncho at the Ritz-Carlton. I have a fetish for fried chicken.

Except-How does one communicate with a man in prison was not quite that bizarre, much less unique. Not in the world at large, and certainly not in Eliza’s world in particular, given her mother’s work at the Patuxent Institute and Eliza’s peculiar history. One could even argue that it was an inevitable question, that if she had allowed herself to think about such things, she would have known that Walter would not leave this world without sending out some sort of manifesto. Not to her, necessarily. She really had come to be almost smug about how she had hidden herself in plain sight. She may not have deliberately chosen to hide herself from Walter, but between Peter’s surname and the move to London, she had felt relatively invisible.

Walter always had a grandiose streak, a concept of himself as someone much larger than he was, in every sense of the word. He had insisted he was five nine, when he was clearly no more than five six or five seven. He became about as angry as Eliza ever saw him, talking about his height, claiming those inches he didn’t have. It was one of the rare times she felt she had the upper hand with him, which had been terrifying and pleasing in equal measure. She couldn’t afford the upper hand with Walter, or so she thought. Later, when people used terms like “Stockholm syndrome”-not her parents, but people far removed from her, prosecutors, journalists, and that odious Jared Garrett-she had found it offensively glib. That experience of being labeled had left her with a lifelong distaste for gossip, a reticence so pronounced that many people thought her incurious, when her real problem was an almost pathological politeness. She hated Iso’s fascination with celebrities, the way she pored over magazine and Internet photos, passing judgment on dresses and hairdos and habits of people she had never met. But Eliza could never explain the virulence of her revulsion to her daughter, not unless she was willing to tell her everything. She would, one day, not today.