
Maybe there was a way out after all.
He followed in the direction the puppies had taken, and after a few strokes he could see them, their little
bodies churning in the water as dirt and debris streamed toward a narrow gap in the rock wall. He
thought of going back to the surface for another breath, then realized that this was his only shot. Either
they managed to push their way out now or they were done for.
Scooping the puppies up and stuffing them back into the front of his jacket, he could feel them squirming
in utter panic as the last molecules of oxygen disappeared from their lungs. Finding a handhold on the
wall, he braced himself, then kicked his legs forward until his feet disappeared into the crevice. Every
instinct told him to get himself back out, to get back to the surface, knowing that he was probably doing
no more than wedging himself into a fissure from which there would be no escape, but he grimly forced
himself farther in, his feet now above his head, the water pushing past him through the crack.
As his torso was squeezed into the fissure, he braced his arms across his chest, hoping he'd be able to
protect the pup-pies from being crushed. By now he wouldn't have been able to force himself back out
even if he'd wanted to. The force of the escaping water held him fast. There was only one way to go, and
that was deeper into the crack. With a twist of his hips, he corkscrewed farther in, the jagged sides of the
opening scraping deep lacerations into his thighs. But he hardly felt the pain. He was a machine now, with
just one purpose: to get through to the other side.
As his head entered the fissure, he could feel his lungs about to give out. In the next five seconds he
would take a breath and they would fill with water. For the puppies it was probably al-ready too late.
Their movements had become less urgent. Perhaps it was just the flow of water that made them seem
alive. With his last scrap of willpower he kicked forward, and a giant hand suddenly seemed to be pulling
him through from the other side. With a violent wrench, his head bumping roughly against the rock, he
was spewed out onto the floor of another chamber. As the waters still surged over him, he managed at
last to take a huge gulp of air—along with a large mouthful of water—into his lungs.
Choking violently, he raised himself onto his hands and knees, and for the first time in what seemed an
eternity, his head was fully out of the water, caressed by an icy blast of precious air. And then it was
being caressed by two eager pink tongues, as the puppies struggled out of his jacket, yelping with joy as
they filled their little lungs. Murphy found he was gasping, laughing, and crying for joy all at the same time.
Once he had managed to steady his breathing and regain his composure, he tried to take stock of his
surroundings. Behind him, he could hear the water still pouring through the gap in the rock, but thankfully
this chamber was not filling up like the other one. The flood tide remained just a few inches deep and
seemed to be draining away through a sinkhole at the other end. For now, at least, they were safe, and
Murphy gave silent thanks for their delivery.
That was when he noticed he was shivering uncontrollably. Hypothermia. The chief cause of death
among cave explorers. And the subject of a class on wilderness survival he himself had taught. He
remembered the young man at the back who had raised his hand at
the end of the lecture.
"How long does it take for a person to die of hypothermia?" he had asked.
"That depends," Murphy had replied, "on how fast your core temperature drops. When it drops to
ninety-six degrees, you begin intense shivering. Between ninety-five and ninety-one degrees the ability to