Fortified by a hearty breakfast, the expedition got off to an early start that morning. Ito and Sato were ready before anyone else. They were dressed identically in warm-weather clothes, from their boots to their hats. Sergei was grumpier than usual, and even Maria's lovely smile couldn't dispel his sour mood, so she just ignored him.

They had shouldered their packs and headed into the interior of the island, using the river as a guide. They made good time across the flat tundra. By midmorning, when they had taken their first break, near Karla's knoll, they had trudged several miles.

As she hoisted her pack to resume the trek, Karla said: “I've been wondering. How did you transport the specimen all the way back to the camp? It must weigh hundreds of pounds.”

Ito smiled and pointed to the packs he and Sato were carrying. “Inflatable rafts. We got the specimen to the river and floated all the way back to camp.”

Ito smiled and bowed politely when Karla congratulated them on their ingenuity.

Sergei took up the lead, followed by the two women with the Japanese men taking up the rear. They struck off inland, away from the river. The topography changed from flat tundra to rolling hills and valleys, and eventually they were on the edge of the rolling foothills that ringed the base of the volcano. As they drew closer to it, the black, truncated mountain that they had seen in the distance began to loom above their head like an altar to Vulcan, the lord of the underworld.

They hiked along the shores of several small lakes and made their way around tussocks of cotton grass that marked boggy areas teeming with migrating birds. The temperature rose to around thirty degrees, but a breeze coming off the Arctic Ocean created a windchill factor that halved that, and Karla was glad that she was wearing her down parka.

The cold wind was no longer a problem, once they had descended into a ravine about thirty feet wide. Twenty-foot banks hemmed them in on both sides. A narrow stream a couple of feet deep ran down the middle, with plenty of room for walking on either side. They traveled along the winding gorge for two hours, and the composition of the banks began to change. Soon it became apparent that the ravine was an ancient mortuary. The river that had created the ravine had cut through layers of time to reveal scores of bones that protruded from the sand under their feet.

Karla stopped and picked up a bison leg bone that fitted perfectly into the socket of another bone she found a few feet away. The other scientists were not impressed. They barely gave the find a second look, and she had to drop the bones and hurry to catch up.