"Because she was party to the concealment of the child's birth."

"That would seem to be a plausible explanation. In the end, regardless of what made Caleb Kyle this way, and regardless of signifiers and whatever grievances he may feel, he's a killing machine, completely without remorse."

"But he felt something for the loss of his child."

Rachel almost leapt from her chair. "Yes!" She beamed at me the way a teacher might beam at a particularly bright pupil. "The problem, or the key, is the sixth girl, the one who was never found. For a whole lot of reasons, most of which would probably result in me being ostracized by my peers if I stated them in print, I think your grandfather was right when he suspected that she was also a victim, but he was wrong in the type of victim."

"I don't understand."

"Your grandfather assumed that she had also been killed but had not been displayed for some reason."

"And you don't." But I could see where she was going, and my stomach tightened at the possibility. It had been at the back of my mind for some time and, maybe, at the back of my grandfather's. I think he hoped that she was dead, because the other option was worse.

"No, I don't believe she was killed, and it comes back to the torture inflicted on those girls. This wasn't simply a means of gaining satisfaction and fulfillment for this man: it was a test. He was testing their strength, knowing at the same time, but perhaps not admitting it to himself, that they would fail his test because they simply weren't strong enough.

"But look at the profile of Judith Mundy. She's strong, well built, a dominant personality. She didn't cry easily, could handle herself in a fight. She would pass that kind of test, to the extent that he probably didn't have to hurt her very much to realize that she was different."

Rachel leaned forward and the expression on her face changed to one of deep abiding sorrow. "She wasn't taken because she was weak, Bird. She was taken because she was strong."

I closed my eyes. I knew now what had happened to Judith Mundy, why she had not been found, and Rachel knew that I had understood.

"She was taken as breeding stock, Bird," she said quietly. "He took her to breed on."

Rachel offered to drive me to Logan, but I declined. She had done enough for me, more even than I felt I had a right to ask. As I walked alongside her across Harvard Square, I felt a love for her made all the more intense by the fact that I believed she was slipping further and further away from me.

"You think this man Caleb may be connected to the disappearance of Ellen Cole?" she asked. Her arm brushed against mine, and for the first time since I had come to Boston, she did not pull away from the contact.

"I don't know for sure," I replied. "Maybe the police are right. Maybe her hormones got to her and she did run away, in which case I'm not sure what I'm doing. But an old man found her and drew her to Dark Hollow and, like I keep telling people, I don't believe in coincidences.

"I have a feeling about this man, Rachel. He's come back, and I think he's returned for Billy Purdue and to avenge himself on everyone who helped to hide him. I think he killed Rita Ferris. It may have been out of jealousy, or to cut Billy off so that he'd have no other ties, or because she was going to leave him and take the boy with her. I don't think that Donald was meant to die. Caleb would have wanted his grandson alive but, somehow, Donald became involved in the struggle. My guess is that he was fatally injured when Caleb tried to push him away."

Something caught in my throat at the memory of Donald, and I didn't speak again until we reached the square. I put out my hand to Rachel. I didn't kiss her because I didn't feel that I had the right. She took my hand and held it tightly.

"Bird, this man feels he has some dispensation to avenge himself on anyone who crosses him because he believes that he's been wronged. I've just labeled him as psychopathic." In her eyes, there was concern, and more.

"In other words, what's my excuse?" I smiled, but it went no deeper than my mouth.

"They're gone, Bird. Susan and Jennifer are dead, and what happened to them and to you was a terrible, terrible thing. But every time you make someone pay for what was done to you, you hurt yourself and you risk becoming the thing you hate. Do you understand?"

"It's not about me, Rachel," I replied softly. "At least, not entirely. Someone has to stop these people. Someone has to take responsibility." There was that echo again.

they are all your responsibility.

Her hand moved gently over mine, her fingers on my fingers, her thumb rubbing lightly on my palm, then she touched my face with her free hand. "Why did you come here? Most of what I told you, you could have figured out for yourself."

"I'm not that smart."

"Don't bullshit a bullshitter."

"So it's true what they say about psychologists."

"Only the New Age ones. You're avoiding the question."

"I know. You're right: some of it I had guessed, or half-guessed, but I needed to hear it back from someone else, otherwise I was afraid that I was going crazy. But I'm also here because I still care about you, because when you walked away you took something from me. I thought that this might be a way of getting closer to you. I wanted to see you again. Maybe, deep down, that's all it was." I looked away from her.

Her grip tightened on my hand. "I saw what you did, back in Louisiana. You didn't go there to find the Traveling Man. You went there to kill him, and anyone who stood in your way got hurt, and got hurt badly. Your capacity for inflicting violence scared me. You scared me."

"I didn't know what else to do, not then."

"And now?"

I was about to answer when her finger touched the scar on my cheek, the mark left by Billy Purdue's blade. "How did this happen?" she asked.

"A man stuck a knife blade in me."

"And what did you do?"

I paused before answering. "I walked away."

"Who was he?"

"Billy Purdue."

Her eyes widened, and it was as if something that had been curled inside her to protect itself gradually began to unfurl. I could see it in her, could feel it in her touch.

"He never had a chance, Rachel. The odds were stacked against him from the start."

"If I ask you a question, will you answer me honestly?" she said.

"I've always tried to be honest with you," I replied.

She nodded. "I know, but this is important. I need to be sure of this."

"Ask."

"Do you need the violence?"

I thought about the question. In the past, I had been motivated by personal revenge. I had hurt people, had killed people, because of what had been done to Susan and to Jennifer, and to me. Now that desire for revenge had dwindled, easing a little every day, and the spaces it left as it receded were filled with the potential for reparation. I bore some responsibility for what happened to Susan and Jennifer. I didn't think that I would ever come to terms with that knowledge, but I could try to make up for it in some small way, to acknowledge my failings in the past by using them to make the present better.

"I did, for a time," I admitted.

"And now?"

"I don't need it, but I will use it if I have to. I won't stand by and watch innocent people being hurt."

Rachel leaned over and kissed me gently on the cheek. Her eyes were soft when she pulled away.

"So you're the avenging angel," she said.

"Something like that," I replied.

"Good-bye, then, avenging angel," Rachel whispered softly.

She turned and walked away, back to the library and her work. She didn't look back, but her head was down and I could feel the weight of her thoughts.

The plane rose from Logan, heading upward and north through the cold air, heavy cloud surrounding it like the breath of God. I thought of Sheriff Tannen, who had promised to hunt up the most recent pictures available of Caleb Kyle. They would be thirty years old, but at least they would be something. I took the blurred newspaper photo of Caleb from my grandfather's folder and looked at it again and again. He was like a skeleton slowly being fleshed out, as if the process of decay were being gradually, irrevocably reversed. A figure that had been little more than a name, a shape glimpsed in the shadows, was assuming an objective reality.