As sickening as this idea was, I could not push it from my mind. Only this conclusion made sense of every incomprehensible action and statement that had followed, right up to the present. Livy's inexplicable promiscuity during high school. Her mother's chronic alcoholism. Not telling me about her pregnancy, then disappearing for a year, cutting herself off from family and friends. Starting life in Virginia as though her life in Mississippi had never existed. Settling in Atlanta. And most telling, her unwillingness to speak to Jenny even twenty years after her birth. What had seemed so cruel hours before suddenly made sense. Jenny was a living reminder of something so terrible that Livy simply could not face it. What had Livy said on the bridge, when I asked if she could ever live in Natchez again?

Not while my parents are alive…

The idea that Leo had sexually abused his daughter from childhood on left me feeling hollowed out, like a wasting disease. Everyone in Natchez thought Livy Marston had enjoyed the most privileged and perfect childhood anyone could, free from want, full of love and adoration. But how many times had she told me that Tuscany was a prison, not a palace? How many times did I discount her laments as the whining of a spoiled rich girl? The night we first began to get close, when she confessed the date rape by an older boy at school… had that been a fictionalized version of rapes by her father? Were they still going on even then? It was difficult to imagine Livy submitting to Leo's advances at that age. He outweighed her by more than a hundred pounds, but by eighteen Livy was a strong, athletic girl. Yet I know very little about abuse, and so much human strength springs from the mind, not the body. Was Livy's entire childhood a lie? Were her stellar performances in every facet of high school and college life part of some elaborate coping mechanism designed to conceal the awful reality she lived behind the walls of Tuscany?

Only two things argued against this interpretation of the facts. The first was Leo's persecution of my father. If I had gotten Livy pregnant, Leo's attack would be easy to understand: a quest for vicarious revenge. But if Leo had impregnated Livy, the malpractice case made no sense. The second was Livy's decision to carry the child to term. If her pregnancy had resulted from a rape by her father, her decision to keep the baby seemed unfathomable. Even the most dogmatic Catholic might consider abortion in those circumstances, and Livy wasn't dogmatic.

I reflected upon Marston's persecution of my father as I splashed water in my face from the motel lavatory and ate a handful of animal crackers Annie had left on the television. As soon as the sugar hit my bloodstream, I saw straight through to the truth of the malpractice lawsuit.

It was blindingly simple.

Maude Marston must have learned of her daughter's pregnancy. And that pregnancy somehow had to be explained. What more likely candidate for fatherhood could there have been than Penn Cage, Livy's most recent boyfriend? Whether Leo actually told Maude this lie or let her think of it herself did not matter. When the chance to persecute my father came, he jumped at it-his sole goal being to reinforce the initial lie about Livy's pregnancy. The question of whether Maude might-at some level-have known of the incestuous relationship was something I didn't even want to think about. But by trying to destroy my father as an act of "vengeance," Leo more deeply concealed his mortal sin from his wife, and perhaps even from himself. I suppose it's even possible that after twenty years of denial, he has convinced himself that I am Jenny's father, the man who "ruined" Livy's life.

Truth always clarifies, but with clarification comes a whirlwind of emotions no one can predict. My initial reaction was horror mixed with outrage. Suddenly even the murder of Del Payton seemed trivial. Payton burned to death in a few agonizing minutes. If I was right about Jenny Doe's parentage, Livy had died a thousand times before she reached adulthood. She has been burning alive for more than thirty years.

I sat alone in the dark well of the night, pondering what to do with this terrible knowledge. After an hour I made some long-distance calls, irritating more than a few people. When dawn broke, I woke Kelly and spoke to him, and a few hours later we executed a ruse which left him surrounded by our FBI watchers at the Natchez Mall Cinema while Sam Jacobs drove me to the Baton Rouge airport in his Hummer. In Baton Rouge, I paid cash for a ticket to Dallas, where I changed planes for Albuquerque, and there boarded the ATR bound for the tiny airport at Crested Butte.

The pilot has begun his descent, plowing up the long mountain valley from the southeast. The snowy majesty of the Rockies leaves me unaffected. At my core, in the moist and primitive darkness, a malevolent seed is germinating. A desire not to publicly humiliate Leo Marston, not even to destroy his career as a lawyer and judge by sending him to Parchman prison, but to end his very life. To remove him from the world. Not in Del Payton's name, but in Livy's. And in mine. For the life he stole from us.

I will soon be listening to former special agent Dwight Stone explain why he cannot tell a jury what he knows about Leo Marston and John Portman. He will soberly tell me about his daughter, the FBI agent. And he will expect me, as a father, to understand his position.

But I will not understand.

I have a surprise for Dwight Stone.

The snow has stopped when we touch down at Crested Butte, but thankfully the car rental company has fitted the tires of my Ford Explorer with chains. I am unaccustomed to icy roads, but it doesn't take me long to get the hang of it. The problem is that only the main roads have been plowed. The forest service road leading up into the mountains (and Stone's cabin) is plowed only to the summer houses by Nicholson Lake. The jeep track that breaks off from that is impassable, at least for someone of my limited mountain skills, so I have no choice but to abandon the Explorer near a large gravel pit and trek up between the mountains on foot.

It takes less than twenty yards to understand the necessity for snowshoes, a type of footwear I have never worn in my life. In my thinly padded windbreaker and tennis shoes, I am practically begging for frostbite, but Stone's cabin can't be more than three miles away. It's after three o'clock, but I should have plenty of light to make it. I rang Stone's phone from the airport to make sure he was there, and hung up as soon as he answered. I don't want him or anyone tapping his phone to know I'm coming until I arrive.

The jeep track is invisible in the snow, but by roughly following the course of the Slate River upstream, I must eventually strike on Stone's cabin, which is situated practically on top of it. Today the Slate, which was only ten or fifteen feet wide on my last trip, is a roaring flood of blue-black water sluicing down the valley like a logging flume. After a seeming eternity of slipping, falling, digging through drifts, and cracking my elbows and butt, I make my way past the entrance of an old mine, along the base of Anthracite Mesa, and up to the edge of a slot canyon, where the Slate is compressed into a raging chute that rockets over an eight-foot vertical drop. I pick my way along the edge of the canyon with care, knowing that a tumble into that water could easily kill me.

At last Stone's cabin comes into sight, nestled among the tall spruce and fir trees between the jeep track and the river. There's a welcome column of smoke rising from its chimney. I have not been this cold for many years. I. stop to catch my breath and marshal my strength, then push on for the last two hundred yards like a climber going for the summit of Everest.

Stone answers his door with a pistol on his hip. The first words out of his mouth are, "You damn fool." Then he jerks me inside, slams the door, and darts to the front window, where he stands peering through the curtains.