MacArthur saw the paw print in soft ground next to the stream. "Jocko!" he gasped. "Look at this! Here's your bear!" It was a forepaw, with a span thrice that of a human hand. Predatory claw marks impaled the muddy soil. "Christ, it's huge!" MacArthur said, stepping back. He looked around warily for more tracks, or their source.

"Told you!" Chastain blurted. "What do we do if we see one?" "Don't shoot. unless you have to." MacArthur stepped out, senses heightened.

Chastain' s round face brightened. "My pappa once told me about David Crockett. You ever hear of David Crockett, Mac?" They plowed through bushes, the stream noisy to their left.

"Yeah, I heard of Davy Crockett," MacArthur replied. "Wore a coonskin cap." Several seconds went by; Chastain seemed to be thinking. MacArthur forged ahead, fighting the bushes. He moved away from the stream.

"My pappa says David Crockett used to hunt bear by smiling at them."

"What, Jocko? Smiling? You kidding me?"

"Yeah—I mean, no," Chastain continued. "David Crockett would see a bear coming, and he would just stand there and smile. The bear would get confused and stop… or something. I don't remember what happened next. But my pappa says it's a true story. David Crockett use to hunt bears by smiling at 'em."

MacArthur chuckled. They broke through blue-flowered thickets and moved onto an outcropping of lichen-covered rock where the stream joined a similar-sized tributary. The terrain descended sharply, filling the watercourse with splashing white water. In the distance they glimpsed the river valley. Beyond the valley MacArthur saw foothills reaching into hazy ridges, and beyond the ridges were magnificent, white-shrouded peaks, partially obscured by low clouds. The sun-star exhibited a golden halo of ice crystals, portent of change.

The land gradually flattened, the adolescent river running smoothly with occasional deep stretches. In the shadows swam dark-backed fish, and the fish invited the attention of bears. MacArthur rounded a bend of large boulders and found himself a dozen paces from the broad back of an ursine monster. The bear stared into the water, massive forepaw poised to strike. MacArthur froze. He eased a forearm straight up, fingers spread, and slowly turned his head, moving a finger to his lips. The Marine retraced his steps, waving behind his back for Chastain to retreat. Walking backward, MacArthur did not see the loose rock on the river's edge. The crumbling shelf gave way, and MacArthur, with a loud splash and an involuntary half-choked yell, slid into the rushing water. The flailing Marine scrambled onto the rock bank and clumsily regained his feet. Chastain moved forward.

The giant beast wheeled and was on them, great flanks and shoulders convulsing, shaking away clouds of dust and insects. Growling belligerently, it reared to its majestic height, menacingly glaring down at them with beady golden eyes. Bigger than even the largest Earth bear, its ears were floppier, more pointed, and its wet, black nose and wolfish snout longer, but the differences were overwhelmed by the similarities. It stank of fish and wet fur; its coat, ragged and mangy, was the color of bright rust, with dusky mane draping back and shoulders. Powerful muscles rippled under its hide, and massive forepaws, with cutlass claws, waved in the air. The bear sniffed the breeze, opening and shutting its mouth to gather and taste the strange scents, drooling and displaying dreadful yellowed fangs. The animal remained ominously quiet, perplexed by the sight of humans. MacArthur, dripping wet, was afraid to move. His rifle was slung over his pack, and his pistol was buttoned into its holster. He dared to glance sideways, to see if Chastain was ready. Chastain stood rifle in hand, but it was aimed at the ground. Disbelieving, MacArthur could only stare at his companion. Chastain stood confidently erect, cherubic features broken by an idiot's grin. MacArthur' s eyes rolled skyward. His trembling hand crept toward his holster.

The vignette held for eternal seconds. Slowly, very slowly, MacArthur worked his pistol free and made ready to repulse an attack, while Chastain just stood—smiling. The bear fell back on its haunches and closed its mouth. MacArthur looked at Chastain and back to the bear, trepidation abating. Unable to resist, MacArthur' s mouth formed an unsteady, toothy grin. More time crept by. The bear dropped to its front paws, slowly turned, and lumbered out of sight behind the rocks.

MacArthur released his breath and forced the muscles of his mouth to relax, wiping a frozen grin away with a sweaty palm. Inhaling a week's supply of air, he holstered his pistol, jerked his rifle from his pack, and signaled for Chastain to return the way they had come. Keeping as quiet as they knew how, the Marines made a wide detour before turning back in the direction of the river.

Half an hour later Chastain broke the silence: "Hey Mac, what's a coonskin cap?"

She had to admit it; the generator made sense.

"Take the generator!" Buccari shouted. "That's crazy!" She and Quinn had retired to the mess decks, joining Rhodes and leaving Hudson on the flight deck. Gunner Wilson was on watch in the communications center.

"We need a power source," Quinn said patiently. "Nearly everyone's down and safe. Now's an acceptable time to take risks. With fuel from the lander we can keep the generator running for years. We can recharge our electrical equipment. We can generate heat. We can keep some level of civilized behavior. It'll be a long time before we're rescued, and Shannon says it's cold down there."

"Commander, I understand," Buccari debated. "That's what I wanted in the first place, but…you were right. The lander is unreliable. I say we load everyone in the lander and get down on the planet while we can. It's too risky to try two runs."

"The lander has gone through a full diagnostic, and we fixed everything that was possibly broken. Right, Virgil?"

"We found all sorts of discrepancies. Full maintenance checks always do," the engineer declared. "We switched out the blaster control. All systems look good."

"All systems look good," Quinn cajoled, his tone revealing his impatience. "Enough discussion. Two more flights, Lieutenant."

"Yes, sir," Buccari said, struggling to sound supportive. "The sooner we try it out, the sooner we'll know what we're up against." She noticed Quinn's fatigue. His eyes had dark circles. His features were haggard, his head and face stubble grizzled and scruffy.

"Two more flights," Quinn repeated with less of an edge. "Virgil and I will keep this hulk alive for a few more orbits. You and Jones take Chief Wilson and Mr. Hudson down with the generator. I have a feeling we will be in for a long, cold winter."

MacArthur and Chastain broke through the last line of brambles. Their burgeoning little watercourse spilled out of its defile and was soon lost in a wide, shallow, gravel-rattling flow. Large bars and shoals built up by previous floods were strung at irregular intervals across the valley bottom. Many of the buildups had reverted to solid land, overgrown with trees and underbrush. Smooth stones squeaked beneath their boots.

"Don't you want to make camp?" Chastain asked.

MacArthur checked the skies, his shoulder pain dulled by the long day's efforts. The overcast was darker. Winds had shifted from the south. The weather had changed.

"Let's keep moving," MacArthur said. "Looks like rain, and I don't want this river rising any higher. I figure no more than four or five kilometers to high ground." He crunched across gravel. The first finger of the river was wide but barely ankle deep.

"This won't be hard to cross," Chastain said. "It's a bunch of shallow rivers."

"Yeah," MacArthur grunted, looking into the distance. A fine mist hung in the air. A low rumbling intruded into his awareness. The next channel was deeper and more powerful but only paces across. They lifted their packs overhead and forded the opaque green-gray torrent. Chilled by the icy waters, the Marines trudged onward, crossing more and more fingers of river. In midvalley they heard a double sonic boom.