The witch Serafina Pekkala, who had rescued Lyra and the other children from the experimental station at Bolvangar and flown with her to the island of Svalbard, was deeply troubled.

In the atmospheric disturbances that followed Lord Asriel's escape from his exile on Svalbard, she and her companions were blown far from the island and many miles out over the frozen sea. Some of them managed to stay with the damaged balloon of Lee Scoresby, the Texan aeronaut, but Serafina herself was tossed high into the banks of fog that soon came rolling in from the gap that Lord Asriel's experiment had torn in the sky.

When she found herself able to control her flight once more, her first thought was of Lyra; for she knew nothing of the fight between the false bear-king and the true one, Iorek Byrnison, nor of what had happened to Lyra after that.

So she began to search for her, flying through the cloudy gold-tinged air on her branch of cloud-pine, accompanied by her daemon, Kaisa the snow goose. They moved back toward Svalbard and south a little, soaring for several hours under a sky turbulent with strange lights and shadows. Serafina Pekkala knew from the unsettling tingle of the light on her skin that it came from another world.

After some time had passed, Kaisa said, "Look! A witch's daemon, lost…"

Serafina Pekkala looked through the fog banks and saw a tern, circling and crying in the chasms of misty light. They wheeled and flew toward him. Seeing them come near, the tern darted up in alarm, but Serafina Pekkala signaled friendship, and he dropped down beside them.

Serafina Pekkala said, "What clan are you from?"

"Taymyr," he told her. "My witch is captured. Our companions have been driven away! I am lost!"

"Who has captured your witch?"

"The woman with the monkey daemon, from Bolvangar… Help me! Help us! I am so afraid!"

"Was your clan allied with the child cutters?"

"Yes, until we found out what they were doing. After the fight at Bolvangar they drove us off, but my witch was taken prisoner. They have her on a ship… What can I do? She is calling to me and I can't find her! Oh, help, help me!"

"Quiet," said Kaisa, the goose daemon. "Listen down below."

They glided lower, listening with keen ears, and Serafina Pekkala soon made out the beat of a gas engine, muffled by the fog.

"They can't navigate a ship in fog like this," Kaisa said. "What are they doing?"

"It's a smaller engine than that," said Serafina Pekkala, and as she spoke there came a new sound from a different direction: a low, brutal, shuddering blast, like some immense sea creature calling from the depths. It roared for several seconds and then stopped abruptly.

"The ship's foghorn," said Serafina Pekkala.

They wheeled low over the water and cast about again for the sound of the engine. Suddenly they found it, for the fog seemed to have patches of different density, and the witch darted up out of sight just in time as a launch came chugging slowly through the swathes of damp air. The swell was slow and oily, as if the water was reluctant to rise.

They swung around and above, the tern daemon keeping close like a child to its mother, and watched the steersman adjust the course slightly as the foghorn boomed again. There was a light mounted on the bow, but all it lit up was the fog a few yards in front.

Serafina Pekkala said to the lost daemon: "Did you say there are still some witches helping these people?"

"I think so—a few renegade witches from Volgorsk, unless they've fled too," he told her. "What are you going to do? Will you look for my witch?"

"Yes. But stay with Kaisa for now."

Serafina Pekkala flew down toward the launch, leaving the daemons out of sight above, and alighted on the counter just behind the steersman. His seagull daemon squawked, and the man turned to look.

"You taken your time, en't you?" he said. "Get up ahead and guide us in on the port side."

She took off again at once. It had worked: they still had some witches helping them, and he thought she was one. Port was left, she remembered, and the port light was red. She cast about in the fog until she caught its hazy glow no more than a hundred yards away. She darted back and hovered above the launch calling directions to the steersman, who slowed the craft down to a crawling pace and brought it in to the ship's gangway ladder that hung just above the water line. The steersman called, and a sailor threw a line from above, and another hurried down the ladder to make it fast to the launch.

Serafina Pekkala flew up to the ship's rail, and retreated to the shadows by the lifeboats. She could see no other witches, but they were probably patrolling the skies; Kaisa would know what to do.

Below, a passenger was leaving the launch and climbing the ladder. The figure was fur-swathed, hooded, anonymous; but as it reached the deck, a golden monkey daemon swung himself lightly up on the rail and glared around, his black eyes radiating malevolence. Serafina caught her breath: the figure was Mrs. Coulter.

A dark-clothed man hurried out on deck to greet her, and looked around as if he were expecting someone else as well.

"Lord Boreal—" he began.

But Mrs. Coulter interrupted: "He has gone on elsewhere. Have they started the torture?"

"Yes, Mrs. Coulter," was the reply, "but—"

"I ordered them to wait," she snapped. "Have they taken to disobeying me? Perhaps there should be more discipline on this ship."

She pushed her hood back. Serafina Pekkala saw her face clearly in the yellow light: proud, passionate, and, to the witch, so young.

"Where are the other witches?" she demanded.

The man from the ship said, "All gone, ma'am. Red to their homeland."

"But a witch guided the launch in," said Mrs. Coulter. "Where has she gone?"

Serafina shrank back; obviously the sailor in the launch hadn't heard the latest state of things. The cleric looked around, bewildered, but Mrs. Coulter was too impatient, and after a cursory glance above and along the deck, she shook her head and hurried in with her daemon through the open door that cast a yellow nimbus on the air. The man followed.

Serafina Pekkala looked around to check her position. She was concealed behind a ventilator on the narrow area of decking between the rail and the central superstructure of the ship; and on this level, facing forward below the bridge and the funnel, was a saloon from which windows, not portholes, looked out on three sides. That was where the people had gone in. Light spilled thickly from the windows onto the fog-pearled railing, and dimly showed up the foremast and the canvas-covered hatch. Everything was wringing-wet and beginning to freeze into stiffness. No one could see Serafina where she was; but if she wanted to see any more, she would have to leave her hiding place.

That was too bad. With her pine branch she could escape, and with her knife and her bow she could fight. She hid the branch behind the ventilator and slipped along the deck until she reached the first window. It was fogged with condensation and impossible to see through, and Serafina could hear no voices, either. She withdrew to the shadows again.

There was one thing she could do; she was reluctant, because it was desperately risky, and it would leave her exhausted; but it seemed there was no choice. It was a kind of magic she could work to make herself unseen. True invisibility was impossible, of course: this was mental magic, a kind of fiercely held modesty that could make the spell worker not invisible but simply unnoticed. Holding it with the right degree of intensity, she could pass through a crowded room, or walk beside a solitary traveler, without being seen.

So now she composed her mind and brought all her concentration to bear on the matter of altering the way she held herself so as to deflect attention completely. It took some minutes before she was confident. She tested it by stepping out of her hiding place and into the path of a sailor coming along the deck with a bag of tools. He stepped aside to avoid her without looking at her once.