His face was covered in blood; these men did not waste time. It was not the first occasion Arnold had been in trouble with the military police but he had never seen these two before, nor had he experienced their methods of interrogation. They tied him to a chair and quite simply beat him to a pulp. He did not have a clue where Steve and the Icelander were or what they were looking for. He held out as long as he could, determined not to tell his interrogators the one thing that might come in useful, but his stamina was limited.

Bateman took out a thick roll of silver tape and bit off a ten-centimetre strip. Like Ripley, he was wearing white rubber gloves. Holding the tape in both hands, he stuck it firmly over Arnold's nose and mouth, then stood in front of him, observing his vain attempts to gasp for oxygen with scientific detachment. When it looked as if Arnold was losing consciousness, Bateman grabbed one corner and tore it away from his nose, leaving a red welt where it had taken a small piece of skin with it.

Arnold's nostrils flared frantically as he sucked in air. The tape still covered his mouth but he inhaled with all his might. Bateman picked up the roll of tape again, bit off another strip and wordlessly fixed the tape over his nose.

'I'm not going to resuscitate you if you keep this up much longer, Arnold,' Ripley said to him.

He writhed in the chair, his blood-drenched face becoming as suffused and swollen as a balloon. Bateman tore the tape off his nose again, this time removing it from his mouth as well.

'I own a Zodiac,' Arnold shouted breathlessly, when he could finally speak between desperate gulps of air. 'Steve knows where it is. He'll use it to get off the base. Don't do it again; I beg you, for Christ's sake, let me breathe.'

'A Zodiac?' Bateman asked.

'I use it for smuggling. I smuggle drugs in and out of the base. I've been doing it for two years. Mostly cocaine but also speed and dope and... I sell it in Reykjavik. I have two contacts there called...'

'Arnold,' Ripley said in a level voice. 'I'm not interested in your little schemes. Tell me where the boat is.'

'I keep it in a bay to the west of the base. There's a gap in the perimeter fence where the road from the big tool store takes a right turn into the lava field. The boat is hidden about five hundred yards away, pretty much directly below the gap in the fence.'

'Excellent. And where are they headed, Arnold?'

'To a beach just outside Hafnir. You'll find it on the map.'

REYKJAViK,

SAt.u.r.dAY 30 JANUARY, 0415 GMT

'There have been some funny goings on here,' observed the scruffily dressed detective in his early fifties, surveying Kristin's flat.

Just before midnight the police had received a phone call from a man in the neighbourhood reporting a young woman in a distressed state who had burst into his family home, demanding to use their phone and speaking incoherently of murder presumably at her house before borrowing some clothes and vanis.h.i.+ng. He had not intended to report the incident and it was more than three hours before he made up his mind to do so, largely at his wife's urging. Although he did not say as much, he was rather ashamed of himself for having let such a thing happen to his family.

The police took a statement and checked the phone's display to identify the number called by the mysterious woman. No one was home at the corresponding address but on investigation they discovered that the house-owner had a daughter. Her age seemed consistent with the description of the woman who had forced her way into the family's home; she also lived in the same neighbourhood and this was deemed sufficient grounds to dispatch two officers. No one answered when they knocked on the door of the flat, located in a two-storey maisonette. The occupants of the upstairs flat said they had been out all evening.

Noticing a small hole in Kristin's door, conceivably made by a bullet, the police called a locksmith. When they entered the flat the first thing they saw was a body lying slumped on the desk.

The detective stood over the man's body, inspecting the contents of his wallet. According to his business card his name was Runolfur Zophania.s.son and he was involved in 'ImportExport'. Apart from that his wallet contained a driving licence, some money, a sheaf of restaurant receipts, and debit and credit cards. The detective glanced around the flat: the furniture appeared to be in place, all the pictures hung straight on the walls, nothing on any of the surfaces seemed to have been disturbed, and there was no sign of any weapon. The body might just as well have fallen from the sky. Cautiously straightening the man up, he examined the bullet wound in his forehead and the gun in his hand.

'Strange angle, don't you think?' he asked his colleague, who was younger and a good deal better dressed. 'If you were going to shoot yourself in the head, would you aim straight at your forehead?'

'I've never given it any thought,' his colleague replied.

'And if he did hold the gun up to his forehead, shouldn't there be signs of scorching or powder marks? Or blowback on his forearm?'

'So you don't think it was suicide, despite the note on the computer?'

'According to his driver's licence, the man lives on the other side of town, in Breidholt. If you were going to kill yourself, would you go to someone else's house to do it?'

'Why do you keep asking me how I would do it if I was going to commit suicide?' the younger detective asked, running a hand down the handsome tie that complemented his suit exactly. 'Is it secret wishful thinking?'

'Not secret enough, obviously,' replied the older man, who in contrast was wearing a torn jumper and battered hat. 'This Kristin who lives here, what does she do?'

'Lawyer with the foreign ministry.'

'And Runolfur here was in the ImportExport business, whatever that means. There's no sign of a struggle, and the upstairs neighbours say they weren't at home. Still, it's a small gun. It wouldn't have made much noise.'

'You're the firearms expert.'

'Indulge me, if you will, in my attempted reconstruction,' the elder officer said, ignoring his colleague's jibe. 'If you were going to kill yourself, would you shoot a bullet through the front door first?'

'Let's see, the door was open. He must have meant to shoot himself in the head but missed and the bullet entered the door. After that he aimed straight at his forehead to be sure of hitting it. Something like that?'

'So he shot himself with the door of the flat open?'

'Looks like it.'

'This is one of the most cack-handed suicides I've ever seen. Why shoot himself here? Was he involved in a relations.h.i.+p with this Kristin?'

'I imagine Kristin would be in a better position to answer that than I am.'

'I suppose we'd better put out a wanted notice. But don't say anything about her being a suspect in a murder inquiry, only that we need to speak to her.'

'Is it really conceivable that a government lawyer could have killed this man?'

'If I were going to murder someone, I'd go for a salesman every time,' the older detective replied, carefully scrutinising the hole in the man's forehead.

KEFLAViK AIR BASE,

SAt.u.r.dAY 30 JANUARY, 0500 GMT

Arnold's directions proved accurate. Before he left them at the administration block, he had told Steve how to get out of the base without using a gate or climbing over the wire. Kristin could not begin to imagine what sort of favour he owed Steve, but it must have been considerable. She preferred not to think about it.

After leaving Thompson, they headed west, away from the airport and Leifur Eiriksson terminal. The military traffic in the area had intensified; police roadblocks had been set up at intervals around the base and soldiers now patrolled the perimeter fence on the Keflavik side. To the south and west the base was bracketed by sea. Avoiding the more frequented ways, they darted from building to building, s.h.i.+elded by the darkness, until the built-up area petered out, giving way to lava and snowfields which ran down to the sh.o.r.e.

The sky was cloudless and full of stars, and with the moon lighting their way they covered the distance quickly. Arnold's detailed description of the landmarks soon led them to the Zodiac. All they needed now was to follow the sh.o.r.e south past Hvalsnes and into Kirkjuvogur bay, to the hamlet of Hafnir, where they could abandon the boat and hitch a lift into Reykjavik. The Zodiac had a quiet outboard motor, a twenty-horsepower engine that chugged into life at the first attempt. As Steve steered away from sh.o.r.e, Kristin had the impression that this was not the first time he had navigated along this stretch of coast. An icy wind buffeted her face and although the boat did not achieve much of a speed, it smacked into the waves at regular intervals, forcing her to cling with all her strength to the rope fastened at the bows. Her anorak was soon drenched by the spray.

A quarter of an hour later they abandoned the boat at Hafnir. They had not spoken at all during the journey.

'Is this how they smuggle the drugs?' Kristin asked at last, once Steve had made the rubber dinghy fast.

'I wouldn't know,' he said. They left it at that.

As they made their way north from Hafnir towards the Reykjanes dual carriageway, they saw the distant reddish-brown glow illuminating the sky above Keflavik and Njardvik. After about forty-five minutes' walk in complete silence they noticed headlights approaching out of the darkness behind them. The car slowed down as it drew near, finally stopping a little way ahead of them. It was a baker on his way to Keflavik; he offered them a lift up to the main road. From there it should not take them long to hitch a lift to Reykjavik.

Michael Thompson had given them the Reykjavik address of Leo Stiller's widow, Sarah Steinkamp, in case she could shed any more light on Stiller's theories. Apart from that, he claimed to know little about her situation and was unwilling to discuss her; he looked in on her every few years for the sake of his old commanding officer, he said, but she was a difficult person angry, bitter and depressive so he never stayed long.

She lived in the old Thingholt district, on the ground floor of a small, dilapidated two-storey wooden house. The corrugated-iron cladding had rusted away where it met the ground and the small windows were only single-glazed. Long ago, the front door had been painted green but most of the paint had now flaked off. A large fir tree stood in the middle of the small garden that had once been enclosed by a wooden fence, the palings of which were now rotten and had largely collapsed.

Kristin and Steve approached the house with caution; they had seen no sign of their pursuers but still peered nervously into the darkness that surrounded them. Despite being confident that they had escaped unseen from the base, they were taking no chances. They stepped into the circle of weak light shed by the tiny lamp above Sarah Steinkamp's door, an icy wind chapping their faces. It was about seven in the morning.

Steve pressed the doorbell. There was a small copper plate on the door with a name engraved on it in faint lettering. It was almost illegible but Kristin thought she could make out 'Sarah Steinkamp'. There were no other names; the upstairs apartment must be unoccupied. Its dark windows stared down at them like empty eye-sockets. Steve pushed the bell again. Even when he put his ear to the door he could hear no sign of life inside.

He rang the bell yet again, more forcefully this time but still nothing happened. They took a few steps backwards from the doorstep and out into the glow of the streetlamps, straining their eyes towards the windows on the raised ground floor but could not see any lights inside. Steve rang the bell a fourth time to be sure and they heard it jangling deep inside the house. They had just turned away, on the point of abandoning hope, when a ground floor window opened. The unexpected noise in the still morning made them both jump. A tremulous woman's voice asked what was going on.

'Are you Sarah Steinkamp?' Steve asked. There was no answer. 'I'm sorry to call so early in the morning but it's urgent.'

'What do you want with her? Who are you?'

'It's about...' Steve began. 'Could you let us in, please? My name's Steve; this is my friend Kristin. She's Icelandic.'

'Icelandic?' said the quavering voice. They could not make out her face in the darkness, just a faint, disembodied silhouette at the window.

'And you? You don't sound Icelandic.'

'I'm American. We need your help. Could you let us in? You're Leo Stiller's widow, aren't you?'

'Leo? What do you want with Leo? Leo's dead.'

'We know that. We want to talk to you about Leo,' Steve said, doing his best to sound agreeable.

They stood motionless for a long time in front of the house, unable to see even whether the figure in the gloom was still at the window. Just as they had given up all hope, the door opened a crack, revealing a woman of tiny, almost dwarflike, stature. The security chain rattled.

'What do you want with my Leo?' she asked, her eyes fixed on Kristin. She spoke English with a thick European accent that Kristin could not place exactly but suspected might be Eastern European.

'It's because he was a pilot,' Steve said. 'We need some information about him.'

'What kind of information? What are you talking about?'

'Could we come in and talk to you?' Steve asked.

'No,' the woman said irritably. 'You can't.'

'It's terribly urgent that we talk to you,' Kristin said, taking two steps towards the door. 'You are Sarah, aren't you? Sarah Steinkamp?'

'Who are you?' the woman asked. 'How do you know my name?'

'My name's Kristin. My brother's in danger. A retired pilot, Michael Thompson, suggested we talk to you. You know him, don't you? He lives on the base.'

'I know Thompson,' the woman said. 'He was a friend of Leo's. Why's your brother in danger?'

'Because of a plane,' Kristin said. 'Your husband was a pilot at the base, wasn't he?'

'Yes, Leo was a pilot.'

'That's why we want to talk to you,' said Kristin, who had inched her way forwards to a spot beside the front door. She had a better view of the woman now: long grey hair, a wrinkled face, her body painfully thin and a little hunched, clad in a worn, brown dressing gown. Admittedly, they had disturbed her at the crack of dawn but Kristin sensed that their sudden appearance had also disturbed her on some more profound level. She hesitated. It was an uneasy stand-off, the woman half-hidden by the door as if she felt a physical threat.

'What plane?' the woman repeated.

'A plane on the Vatnajokull glacier,' Kristin replied.

'On Vatnajokull?' the little woman said in surprise.

'Yes, my brother saw a plane on the glacier and then I lost contact with him. He saw soldiers too.'

The old woman pulled her dressing gown more tightly around her.

'Come in,' she said in a low voice, undoing the chain and opening the door wider. Kristin hesitated, then stepped inside the house, Steve at her heels, entering a hall that served both flats. A staircase led up to the floor above but directly opposite them the door to the old woman's flat stood open. Inside it was dark and stiflingly hot; she must have left the radiators on full blast all night. Kristin lost sight of the little woman as she vanished into the gloom. She stood stock still, not daring to move forward, s.c.r.e.w.i.n.g her eyes up towards where she thought she saw a movement. Then a match hissed and she saw the woman's face briefly illuminated in the flame. She was lighting candles; the house appeared to be full of them and the old woman walked around lighting one after another until Kristin lost count. They cast a soft, flickering glow over the sitting room. Kristin noticed a piano and a violin, family photographs crowding the walls and tables, a threadbare sofa and armchairs, and thick rugs on the floors. The woman invited them to sit down but she herself remained standing by the piano.

'I feel like Gretel,' Kristin whispered to Steve.

'Then I'm Hansel,' Steve breathed back. 'As long as she doesn't put us in her oven.'

'Please excuse the intrusion, Mrs Steinkamp,' Kristin said, once her eyes had adjusted to the candlelight. 'We had no alternative. We won't keep you long.'

'I don't understand how Leo could have anything to do with you,' the woman said.

'It's a long, complicated story,' Steve replied.

'But it's more than thirty years since he died,' the woman pointed out.

'Yes, how did he die?'

'He was killed in a helicopter crash. An error, they said, but I never received any explanation. They never conducted an inquiry but I have my suspicions. I moved away from the base and came to Reykjavik. They send me his pension every month.'

'What happened?' Kristin asked.

'Leo was an outstanding pilot,' the woman said, the dim glow of the candles playing over her features. She had clearly once been an elegant, even beautiful, young woman but Kristin suspected that life had not been kind to her; age had set its stamp on her hard and there was a glittering determination in her eyes that hinted at past troubles. She must have been in her late seventies. Kristin examined the family pictures on the walls and piano; they were old, taken in the first half of the century, all photos of adults or elderly people, encased in thick, black frames. She could not see any children in the pictures, nor any recent photos or colour pictures. Only old, black-and-white images of men and women, posing for the photographer in their best clothes. The woman caught her looking at them.

'All long dead,' she said. 'Every single one of them. That's why there aren't any new pictures. Those are mourning frames. Is that enough of an answer for you?'

'I'm sorry,' Kristin said. 'I didn't mean to pry.'

'Leo told me to keep my maiden name, Steinkamp. That was Leo all over. He was a Jew like me. We met in Hungary after the war and he took me in. My family were all dead. All I had left were photographs. Everything else had gone. Our neighbour in Budapest had saved them. Leo tracked him down and I've kept the pictures with me ever since.'