The second torpedo was lying at the bottom.

From now on it would be child's play. She hurried on. Maybe it wouldn't be so easy after all – fallen objects blocked several of the companionways. It would take too long to clear them. She had to go back. Up and on to the hangar deck, then down the ramp.

Hugging the torpedoes, she made her way up as fast as she could.

Anawak

Rubin weighed a tonne. Once they'd pulled on their wetsuits – to Johanson's groans of pain – they combined forces to drag the body up the starboard jetty, which was sticking out into the air like a ski-jump. The water had drained away from the stern gate now, exposing the planked floor. The four moored Zodiacs had risen steadily as the contents of the basin flowed into the tunnel towards the lab. Anawak listened to the creaking steel and wondered how much longer the vessel could bear the strain.

The three submersibles were hanging obliquely from the ceiling. Deepflight 2 had taken the place of the missing Deepflight 1. The other two boats had each moved up a position.

'Which one was Li intending to take?' asked Anawak.

'Deepflight 3,' said Weaver.

They inspected the control panel and flipped various switches. Nothing happened.

Anawak's eyes scanned the console. 'Roscovitz said that the well deck had its own power supply.' He bent closer to the desk and read the labels. 'OK, this is the one. It lowers the submersibles. Let's have Deepflight 3, so Li can't cause any trouble if she shows up here.'

Weaver activated the mechanism. A submersible descended from the rail, but it was the first, not the second.

'Um, can't you get Deepflight 3 for me?'

'Well, I expect I could, if I knew how the bloody thing worked. They're going to have to come down one by one.'

'Never mind,' Johanson said. 'We don't have time to worry about it. Take Deepflight 2 instead.'

They waited until the boat was hovering alongside the jetty. Weaver bounded over and opened the pods. Rubin's body was unbelievably heavy, saturated with water and pheromone fluid. His head jerked back and forth, eyes glazed and staring emptily into space. Together they pushed and pulled until it plopped into the co-pilot's pod. They were ready.

Anawak thought of the iceberg in his dream. He'd known that the time would come when he'd be called under water. The iceberg would melt and he'd sink to the bottom of an unknown sea…

But who or what would he meet there?

Weaver

'You're not going, Leon.'

'What do you mean?'

'What I say.' One of Rubin's feet was sticking out of the pod. Weaver kicked it back in. 'I'm going.'

'Why?'

'Because that's how it should be, that's why.'

'You can't.' He took her by the shoulders. 'Karen, you might not come back alive, it's-'

'I know the risks,' she said softly, 'but none of our chances are good. You two take the other subs and wish me luck.'

'Karen! Why?'

'Do you really need to hear reasons?'

'Forgive me for interrupting,' said Johanson, 'but we're rather pushed for time. Why don't you both stay, and I'll go?'

'No.' Weaver hadn't taken her eyes off Anawak. 'Leon knows I'm right. I can steer a Deepflight in my sleep. I've got the edge over you both there. I've been down thousands of metres in Alvin exploring the Mid-Atlantic Ridge. I know more about submersibles than the two of you put together and -'

'Nonsense,' cried Anawak. 'I can fly it as well as you can.'

'It's my world down there. It's the deep blue sea, Leon. That's been my world since I was ten.'

He opened his mouth but Weaver pressed her finger to his lips and shook her head. I'm going.' She looked around. 'Once I'm in, you can open the sluice and lower me. God knows what will happen once the flaps are open. We may find ourselves under attack, or maybe nothing will happen. Let's hope for the best. Once I've released the boat from the chain, wait a minute or so if you can, then take the second sub. Don't try to follow me. Stay close to the surface and get away from the ship. I may have to dive pretty deep. And afterwards…' She paused. 'Well, hopefully someone will fish us out. At least these things have satellite transmitters.'

'At a rate of twelve knots it would take two days to get to Greenland or Svalbard,' said Johanson. 'There's not enough fuel.'

Her heart felt heavier all the time. She gave Johanson a hug – and remembered their escape from the tsunami in the Shetlands. They'd see each other again.

'Brave girl,' he said.

Then she took Anawak's face in both hands and pressed her lips firmly to his. They'd never really talked, never done any of the things that would have been so right. . . Then she leaped into the pilot's pod. The submersible rocked gently. Lying on her belly, Weaver got into position and activated the locks. Slowly the pods closed. She scanned the instruments and gave the thumbs-up.

The World of the Living

Johanson stepped up to the control desk, opened the sluice and lowered the boat. They watched as the Deepflight dropped down and the steel flaps swung open beneath it. Dark water. This time nothing tried to force its way inside the vessel. Weaver used the controls to uncouple the submersible from its chain. It splashed down and sank through the water. Trapped air shimmered inside the clear domes. The craft's colours paled, its contours blurred, and it became a shadow.

It vanished.

Anawak felt a twinge.

The heroes' roles were handed out long ago, and they're only for dead men. You belong in the world of the living.

Greywolf!

Perhaps you'll need someone to tell you what the bird spirit sees.

Akesuk had been talking about Greywolf! His friend had been able to interpret his dream. The iceberg had melted, but Anawak's path didn't lead into the depths: it took him up to the light.

Into the world of the living.

To Crowe.

Anawak's mind jerked back to the present. Of course. How could he have allowed himself to be sidetracked? There was work to be done on board the Independence.

'What now?' asked Johanson.

'Plan B.'

'Which is?'

'I've got to go back up.'

'Are you crazy? Whatever for?'

'I need to find Sam – Sam and Murray.'

'They've all gone,' said Johanson. 'The ship must have been evacuated by now. They were in the CIC last time I saw them. They were probably on the first helicopter out.'

'No.' Anawak shook his head. 'They can't have been. Or, at least, Sam wasn't – I'm sure I heard her shouting for help. Look, I don't want to bore you with my problems, Sigur, but I've spent too long avoiding things in life. I'm not like that any more, and I can't just look away. Do you see?'

Johanson smiled.

'I'm going to give it one last try. In the meantime, you can lower Deepflight 3 and get her ready to go. If I don't find Sam in the next few minutes, I'll come back and we'll get the hell out of here.'

'And if you do find her?'

'Then we've always got Deepflight 4.'

'OK.'

'Do you mean that?'

'Of course.' Johanson spread his hands. 'What are you waiting for?'

Anawak bit his lip. 'If I'm not back in five minutes you're to leave without me.'

'I'll wait.'

'Five minutes. No longer.'

Anawak ran down the jetty. The opening of the tunnel was flooded, but the ship hadn't tilted any further during the last few minutes.

Water swirled round his ankles. He waded in, swam a few strokes and walked a couple of metres until it got deeper. As he approached the start of the ramp leading up to the hangar, the ceiling seemed to tilt towards the water. There were still a few metres of air left overhead. He swam past the locked door to the lab, turned the corner and looked up. While parts of the ramp had become almost level, others were precipitously steep. The section leading up to the hangar deck now formed a gloomy peak. A dark cloud of smoke hung above it. He'd have to crawl up on all fours. In spite of the wetsuit he was cold. Even if they escaped in the submersible, there was no guarantee that they'd come out of this alive.