He found car tracks in the brown grass beside the path. The deep, rough prints suggested it had been a heavy vehicle with off-road tyres, a Land Rover or something similar. With all the rain that had fallen in recent weeks, the tracks couldn't have been that old. A couple of days at most.

He scouted around, thinking there was nothing quite as desolate as summer resorts in autumn. On his way up to the chalet again, Harry nodded to the gull.

Halvorsen was bent over the front door with an electric picklock, groaning.

'How's it going?'

'Badly.' Halvorsen straightened up and wiped away his sweat. 'This is no amateur lock. It's the crowbar or give up.'

'No crowbar.' Harry scratched his chin. 'Have you checked under the doormat?'

Halvorsen sighed. 'No, and I'm not going to, either.'

'Why's that?'

'Because this is a new millennium and you don't put chalet keys under the doormat any longer. Especially not if it's a luxury chalet. So, unless you're willing to bet a hundred, I simply can't be bothered. Alright?'

Harry nodded.

'Fine,' Halvorsen said, crouching down to pack the case.

'I meant, you're on,' Harry said.

Halvorsen looked up. 'You're kidding?'

Harry shook his head.

Halvorsen grabbed the edge of the synthetic fibre mat.

'Come seven,' he mumbled and whipped the mat away. Three ants, two woodlice and an earwig came to life and wandered around the grey concrete. But no key.

'Now and then you're incredibly naive, Harry,' Halvorsen said, holding out his palm. 'Why would he leave a key?'

'Because,' said Harry, whose attention had been caught by the wrought-iron lamp beside the door and hadn't seen the extended hand. 'Milk goes off if it's left in the sun.' He went over to the lamp and unscrewed the top.

'What do you mean?'

'The groceries were delivered the day before Albu arrived, weren't they. They obviously had to be put in the house.'

'So? Perhaps the grocery man has a spare key?'

'I don't think so. I think Albu wanted to be absolutely sure no one came bursting in while he and Anna were here.' He whipped off the top and scoured the glass interior. 'And now I know so.'

Halvorsen withdrew his hand, muttering.

'Notice the smell,' Harry said when they entered the living room.

'Green soap,' Halvorsen said. 'Someone has thought fit to wash the floor.'

The heavy furniture, the rustic antiques and the large stone fireplace reinforced the Easter holidays impression. Harry went to a pine shelving system at the other end of the room. Old books on shelves. Harry's eyes ran across the titles on the worn spines, but still had the feeling they had never been read. Not here. They might have been bought as a job lot from one of the antiquarian bookshops in Majorstuen. Old photo albums. Drawers. In the drawers there were Cohiba and Bolivar cigar boxes. One of the drawers was locked.

'So much for the clean-up then,' Halvorsen said. Harry turned and saw his colleague pointing to wet, brown footprints running diagonally across the floor.

They took off their shoes in the hallway, found a floor cloth in the kitchen and after wiping the floor, agreed Halvorsen should take the living room while Harry took the bedrooms and the bathroom.

What Harry knew about house searches he had learned in a hot classroom at Police College one Friday after lunch when everyone was dying to go home, have a shower and hit the town. There was no manual, only a certain Inspector Rшkke. And on this Friday he had given Harry the one tip he had later used as his sole guide: 'Don't think about what you are searching for. Think about what you find. Why is that there? Should it be there? What does it mean? It's like reading-if you think about an "l" while looking at a "k", you won't see the words.'

The first thing Harry saw when he came into the first bedroom was the large double bed and the photograph of herr and fru Albu on the bedside table. It wasn't large, but it was conspicuous because it was the only photograph and faced the door.

Harry opened a wardrobe. The smell of another person's clothes hit him. There was no casual clothing, only evening dresses, blouses and a couple of suits. Plus a pair of studded golf shoes.

Harry went through all three wardrobes systematically. He had been a detective for too long to feel embarrassment at going through other people's personal effects.

He sat down on the bed and studied the photograph. The background was only sea and sky, but the way the light fell made Harry think it must have been taken in southern climes. Arne Albu was brown and there was the same boyish mischievousness in his expression Harry had seen in the restaurant in Aker Brygge. He had a firm grip around his wife's waist. So firm that Vigdis's upper body seemed to be leaning towards him.

Harry rolled the bedspread and duvet to the side. If Anna had been in this bed they would definitely find hair, fragments of skin, saliva or sexual secretions. All of them, probably. But it was as he thought. He ran a hand over the starched sheet and put his face to the pillow and breathed in. Just washed. Fuck.

He opened the drawer of the bedside table. A packet of Extra chewing gum, an unopened packet of Paralgin, a keyring with a key and a brass plate with the initials A.A. on, a photograph of a naked baby curled up like a larva on a changing table, and a Swiss army knife.

He was about to pick up the knife when he heard the single, chilling scream of a gull. Involuntarily he shivered and glanced through the window. The gull was gone. He went back to his search when he heard the sharp barking of a dog.

At that moment Halvorsen appeared in the doorway: 'Someone coming up the pathway.'

His heart pounded as if turbo-charged.

'I'll get the shoes,' Harry said. 'You bring the case with all the equipment in here.'

'But-'

'We'll jump out of the window when they're in. Quick!'

The barking outside increased in volume and intensity. Harry sprinted across the living room to the hall while Halvorsen knelt in front of the shelves and threw powder, brush and sticky paper into the case. The barking was now so close that Harry could hear the deep-throated growls between the barks. Footsteps outside. The door was not locked, it was too late to do anything, he would be caught red-handed! He breathed in and stood where he was. He might just as well face the music there and then. Perhaps Halvorsen would be able to escape. That way, he wouldn't have Halvorsen's dismissal on his conscience.

'Gregor!' came a man's shout from the other side of the door. 'Come back!'

The barking became more distant and he heard the man outside move off the doorstep.

'Gregor! Leave the deer alone!'

Harry took two steps forward and discreetly turned the lock. Then he picked up the two pairs of shoes and crept through the living room as keys were being jangled outside. He closed the bedroom door behind him as he heard the front door opening.

Halvorsen was sitting on the floor under the window and staring at Harry with dilated eyes.

'What is it?' Harry whispered.

'I was on my way out of the window when the mad dog came,' Halvorsen whispered. 'It's a large Rottweiler.'

Harry peered out of the window and down at snapping jaws. The dog had both front paws against the outside wall. The sight of Harry made it jump up the wall and bark as though possessed. Saliva dripped from its fangs. The sound of heavy footsteps in the living room. Harry slumped down on the floor next to Halvorsen.

'Seventy kilos max,' he whispered. 'No big deal.'

'Please. I've seen a Rottweiler attacking Victor, the dog handler.'

'Mm.'

'They lost control of the dog in training. The officer playing the villain had to have his hand sewn back on at Rikshospital.'