The river by this time had changed color, because it was meeting the remains of the first floodwaters that had swept down out of the Arctic. The convulsions had affected the earth differently in different places, Will saw; village after village stood up to its roofs in water and hundreds of dispossessed people tried to salvage what they could with rowboats and canoes. The earth must have sunk a little here, because the river broadened and slowed, and it was hard for the skipper to trace his true course through the wide and turbid streams. The air was hotter, and the sun higher in the sky, and the bears found it hard to keep cool; some of them swam alongside as the steamer made its way, tasting their native waters in this foreign land.

But eventually the river narrowed and deepened again, and soon ahead of them began to rise the mountains of the great central Asian plateau. Will saw a rim of white on the horizon one day and watched as it grew and grew, separating itself into different peaks and ridges and passes between them, and so high that it seemed that they must be close at hand—only a few miles. But they were far off still; it was just that the mountains were immense, and with every hour that they came closer, they seemed yet more inconceivably high.

Most of the bears had never seen mountains, apart from the cliffs on their own island of Svalbard, and fell silent as they looked up at the giant ramparts, still so far off.

"What will we hunt there, Iorek Byrnison?" said one. "Are there seals in the mountains? How shall we live?"

"There is snow and ice," was the king’s reply. "We shall be comfortable. And there are wild creatures there in plenty. Our lives will be different for a while. But we shall survive, and when things return to what they should be, and the Arctic freezes once more, we shall still be alive to go back and claim it. If we had stayed there, we would have starved. Be prepared for strangeness and for new ways, my bears."

Eventually the steamer could sail no farther, because at this point the riverbed had narrowed and become shallow. The skipper brought the vessel to a halt in a valley bottom that normally would have been carpeted with grass and mountain flowers, where the river would have meandered over gravel beds; but the valley was now a lake, and the captain insisted that he dared not go past it. Beyond this point, he explained, there would be not enough depth below the keel, even with the massive flood from the north.

So they drew up to the edge of the valley, where an outcrop of rock formed a sort of jetty, and disembarked.

"Where are we now?" said Will to the captain, whose English was limited.

The captain found a tattered old map and jabbed at it with his pipe, saying, "This valley here, we now. You take, go on."

"Thank you very much," Will said, and wondered if he ought to offer to pay; but the captain had turned away to supervise the unloading.

Before long all thirty or so bears and all their armor were on the narrow shore. The captain shouted an order, and the vessel began to turn ponderously against the current, maneuvering out into midstream and giving a blast on the whistle that echoed for a long time around the valley.

Will sat on a rock, reading the map. If he was right, the valley where Lyra was captive, according to the shaman, lay some way to the east and the south, and the best way there led through a pass called Sungchen.

"Bears, mark this place," said Iorek Byrnison to his subjects. "When the time comes for us to move back to the Arctic, we shall assemble here. Now go your ways, hunt, feed, and live. Do not make war. We are not here for war. If war threatens, I shall call for you."

The bears were solitary creatures for the most part, and they only came together in times of war or emergency. Now that they were at the edge of a land of snow, they were impatient to be off, each of them, exploring on their own.

"Come, then, Will," said Iorek Byrnison, "and we shall find Lyra."

Will lifted his rucksack and they set off.

It was good walking for the first part of their journey. The sun was warm, but the pines and the rhododendrons kept the worst of the heat off their shoulders, and the air was fresh and clear. The ground was rocky, but the rocks were thick with moss and pine needles, and the slopes they climbed were not precipitous. Will found himself relishing the exercise. The days he had spent on the boat, the enforced rest, had built up his strength. When he had come across Iorek, he had been at the very last of it. He didn’t know that, but the bear did.

And as soon as they were alone, Will showed Iorek how the other edge of the knife worked. He opened a world where a tropical rain forest steamed and dripped, and where vapors laden with heavy scent drifted out into the thin mountain air. Iorek watched closely, and touched the edge of the window with his paw, and sniffed at it, and stepped through into the hot, moist air to look around in silence. The monkey shrieks and birdcalls, the insect scrapings and frog croakings, and the incessant drip-drip of condensing moisture sounded very loud to Will, outside it.

Then Iorek came back and watched Will close the window, and asked to see the knife again, peering so closely at the silver edge that Will thought he was in danger of cutting his eye. He examined it for a long time and handed it back with hardly a word, only saying, "I was right: I could not have fought this."

They moved on, speaking little, which suited them both, Iorek Byrnison caught a gazelle and ate most of it, leaving the tender meat for Will to cook; and once they came to a village, and while Iorek waited in the forest, Will exchanged one of his gold coins for some flat, coarse bread and some dried fruit, and for boots of yak leather and a waistcoat of a kind of sheepskin, for it was becoming cold at night.

He also managed to ask about the valley with the rainbows. Balthamos helped by assuming the form of a crow, like the daemon of the man Will was speaking to; he made the passage of understanding easier between them, and Will got directions, which were helpful and clear.

It was another three days’ walk. Well, they were getting there. And so were others.

Lord Asriel’s force, the squadron of gyropters and the zeppelin fuel tanker, had reached the opening between the worlds: the breach in the sky above Svalbard. They had a very long way to go still, but they flew without pause except for essential maintenance, and the commander, the Afric King Ogunwe, kept in twice-daily touch with the basalt fortress. He had a Gallivespian lodestone operator aboard his gyropter, and through him he was able to learn as quickly as Lord Asriel himself about what was going on elsewhere.

The news was disconcerting. The little spy, the Lady Salmakia, had watched from the shadows as the two powerful arms of the Church, the Consistorial Court of Discipline and the Society of the Work of the Holy Spirit, agreed to put their differences aside and pool their knowledge. The Society had a swifter and more skillful alethiometrist than Fra Pavel, and thanks to him, the Consistorial Court now knew exactly where Lyra was, and more: they knew that Lord Asriel had sent a force to rescue her. Wasting no time, the Court commandeered a flight of zeppelins, and that same day a battalion of the Swiss Guard began to embark aboard the zeppelins waiting in the still air beside the Lake of Geneva.

So each side was aware that the other was also making its way toward the cave in the mountains. And they both knew that whoever got there first would have the advantage, but there wasn’t much in it: Lord Asriel’s gyropters were faster than the zeppelins of the Consistorial Court, but they had farther to fly, and they were limited by the speed of their own zeppelin tanker.

And there was another consideration: whoever seized Lyra first would have to fight their way out against the other force. It would be easier for the Consistorial Court, because they didn’t have to consider getting Lyra away safely. They were flying there to kill her. The zeppelin carrying the President of the Consistorial Court was carrying other passengers as well, unknown to him. The Chevalier Tialys had received a message on his lodestone resonator, ordering him and the Lady Salmakia to smuggle themselves aboard. When the zeppelins arrived at the valley, he and the Lady were to go ahead and make their way independently to the cave where Lyra was held, and protect her as well as they could until King Ogunwe’s force arrived to rescue her. Her safety was to come above every other consideration.