Monks stepped up behind him, raising the rifle as he moved, and slammed the butt into the back of Hammerhead’s skull. He crashed to the ground like a fallen oak and lay still.

This time, Monks had not had the slightest hesitation. In fact, it had been thrilling.

He dragged Hammerhead into the shed and slammed the door shut. Marguerite dropped in the half-inch bolt that secured the hasp. Her rich black hair was slick and shining with rain like a wet animal pelt, and her eyes shone with an unknowable range of emotions. Monks gripped her shoulders and hugged her hard.

“Let’s get Mandrake,” he said, and sprinted toward the lodge.

Monks jogged along behind Marguerite, the warm inert weight of Mandrake bobbing gently on his back, like a child who had fallen asleep in his carrier. She led them to a steep, narrow ravine a quarter of a mile from the main camp. It looked like a giant ax split in a cliff face-the kind that was usually dry, but could become cascades during storms.

“The sensors don’t work when it floods,” she said into his ear, half yelling to be heard over the rushing water.

He shined the flashlight on the muddy, frothing stream, looking for a place to ford. It was about ten yards wide, the depth hard to estimate. The banks were slick and steep, but there were small trees that would serve as handholds.

“What happens when we get across?” he yelled back.

“There’s a trail. But we have to be careful, they’ve got ATVs.”

“Do you know the country out there?”

“Not really. Just right around here.”

Monks decided to worry about that when and if they got that far. He slung the rifle over his shoulder, easing it beside Mandrake’s head.

“Hang on to my belt,” he told her.

They made their slippery way down the near bank, bracing themselves against the trees. At the bottom, he took a tentative step into the stream. It tore at his boot, filling it instantly with a powerful drag that tried to pull his foot out from under him. He crouched, hands outspread in case he fell, then started across.

There was plenty of tangled deadfall underwater that tripped their feet, but gave them more handholds. At midstream, Monks realized with relief that the water was only thigh deep. They floundered the rest of the way across and pulled themselves up the far bank. In the shelter of a big fir, they dropped to the ground, soaked, panting-

But out of the camp.

Monks emptied out his sloshing boots, wishing bitterly that he’d at least had had the intuition to put on lug-soled hiking boots when he’d left his house.

He checked his watch. It was 7:28 P.M. Hammerhead would be missed when he failed to call in at 8 P.M.-maybe earlier, if he came to and his shouts attracted someone, or he managed to kick his way out of the shed. With luck, the sentries would spend some time trying to figure out which way they had gone, but that could not be counted on. Monks figured that they had half an hour at most before they would have to abandon the road and strike off into the wilderness. The going would be much rougher then.

He took the small jar of meth and the paper tube out of his jacket’s zippered inside pocket and handed them to Marguerite. He was acutely aware that their head start was dwindling fast, but an energy charge was worth the extra minute. The next hours, however they turned out, were going to be brutal.

When she was finished, he took his turn. With the drug’s harsh fire piercing his brain, he gave her the flashlight, unslung his rifle, and followed her at a jog. The path was overgrown with weeds, barely visible, but he could see the vestiges of tire tracks.

His sense of direction was utterly blotted out. He could have been heading toward the moon.

He slogged along at his half-run, working to keep up with the younger, quicker woman. The meth told his brain that he could lope like a wolf all night, but his body, with the days of cumulative fatigue and his clumsy boots and wet clothes and the extra weight he was carrying, was already laboring hard. His ears strained to pick up the sound of an approaching engine over the driving rain.

If the heavily armed, night-goggled maquis caught up with them, it would mean a firefight.

A short one.

When the half-hour was up, Monks guessed that they had gone about two miles. He was starting to get a feel for the terrain. The trail was cut into a mountainside, running at a slight downhill grade. He watched the faint luminescent tunnel that Marguerite’s flashlight opened up in the blurry night, hoping for a flat stretch to one side or the other, but the going was steep, both uphill and down. His body heat from the first strenuous exertions had evened out, and he was noticing that tonight was quite a bit colder than it had been. The raindrops pelting through the flashlight’s beam were taking on the thick, splayed look of turning toward snow. So far, whatever tracks they had left would be hard to follow. But in fresh snow, footprints would be unavoidable-another reason to get off the road.

He decided to head uphill. It might help throw off their pursuers, who would expect them to take the easier course. And downhill was likely to lead them to another flooded ravine like the one they had crossed getting out of camp, but potentially larger and impossible to ford. He watched the light beam intently for the next couple of minutes, and finally settled on a rockslide as a takeoff point.

He slowed to a walk, pulling in deep rasping lungfuls of wet air, and called hoarsely to Marguerite to stop.

“Turn off the light, and don’t turn it on again unless I tell you,” he said when he caught up to her.

But before she clicked off the beam, he caught a glimpse of her eyes. The earlier euphoria was gone. She looked scared and tense, and while it was impossible to tell in the rain, he thought she might be weeping. He realized that with all of his own concerns, he hadn’t thought about the hurricane of violence and emotions that she had been going through.

He put his arm around her shoulders.

“Look, we’re doing great,” he said, speaking forcefully, close to her, as he would to a green ER resident or nurse losing her nerve. “You’re saving this little boy’s life, remember that. Now come on, we’re going to make it.”

He wondered if, in the instant before the light beam vanished, she saw the madness in his own eyes.

By midnight, there were two inches of new snow on the ground and the air was thick with big wet flakes, swirling around in a near-blizzard. The going was increasingly harder and colder. They were long past trying to run-now they were just trudging soddenly and blindly in the hope of gaining distance. His feet were aching and at the point of numbness.

He tried not to think about how easy it was to get turned around in these kinds of conditions.

They had made it up the rockslide and onto a ridge, then gradually downward into what seemed to be the floor of a broad valley. The pressing claustrophobic canopy of trees had thinned, yielding to a sense of open space. It was getting to be time for Mandrake’s hourly check, and Monks was looking for a sheltering tree, when he saw Marguerite’s form, barely visible a few yards off to his left, stumble and fall.

He hurried to her side, expecting her to scramble back to her feet. But she lay where she was. He knelt and put his hand on her, feeling her racking shivers. Her clothes, like his, were soaked through. He pulled the flashlight from her pack and shined it on her face. Her eyes were dull and unfocused and her teeth were chattering.

Hypothermia. She needed to warm up, fast. Stopping might cost them their lead, but there was no choice.

Monks turned in a circle, staring futilely into the night for some sign of shelter. The flashlight’s beam, like headlights, showed nothing but the whirling snow. He didn’t dare leave her and scout on his own-he might not be able to find her again.