“What do you mean?” Sigurdur Oli said.

“What was that lecture all about?” Elinborg said.

“What if some of these men or women never set off from the farm in the first place?”

“What are you getting at?” Elinborg asked.

“What if people said so-and-so had set off for the moors or for another farm or went to lay a fishing net in the lake and was never heard of again? A search is mounted, but he’s never found and is given up for lost.”

“So the whole household conspires to kill this person?” Sigurdur Oli said, sceptical about Erlendur’s hypothesis.

“Why not?”

“Then he is stabbed or beaten or shot and buried in the garden?” Elinborg added.

“Until one day Reykjavik has grown so big that he can’t rest in peace any longer,” Erlendur said.

Sigurdur Oli and Elinborg looked at each other and then back at Erlendur.

“Benjamin Knudsen had a fiancee who disappeared under mysterious circumstances,” Erlendur said. “Around the time that the chalet was being built. It was said that she threw herself into the sea and Benjamin was never the same afterwards. Seems to have had plans to revolutionise the Reykjavik retail trade, but he went to pieces when the girl disappeared and his burgeoning ambition evaporated.”

“Only she didn’t disappear at all, according to your new theory?” Sigurdur Oli said.

“Oh yes, she disappeared.”

“But he murdered her.”

“Actually I find it difficult to imagine that,” Erlendur said. “I’ve read some of the letters he wrote to her and judging from them he wouldn’t have touched a hair on her head.”

“It was jealousy then,” said Elinborg, an avid reader of romances. “He killed her out of jealousy. His love for her seems to have been genuine. Buried her up there and never went back. Finito.”

“What I’m thinking is this,” Erlendur said. “Isn’t a young man overreacting a bit if he turns senile when his sweetheart dies on him? Even if she commits suicide. I gather that Benjamin was a broken man after she went missing. Could there be something more to it?”

“Could he have kept a lock of her hair?” Elinborg pondered, and Erlendur thought she still had her mind on pulp fiction. “Maybe inside a picture frame or a locket,” she added. “If he loved her that much.”

“A lock of hair?” Sigurdur Oli repeated.

“He’s so slow on the uptake,” said Erlendur, who had grasped Elinborg’s train of thought.

“What do you mean, a lock of hair?” Sigurdur Oli said.

“That would rule her out if nothing else.”

“Who?” Sigurdur Oli looked at them in turn. “Are you talking about DNA?”

“Then there’s the lady on the hill,” Elinborg said. “It would be good to track her down.”

“The green lady,” Erlendur said thoughtfully, apparently to himself.

“Erlendur,” Sigurdur Oli said.

“Yes?”

“Obviously she can’t be green.”

“Sigurdur Oli.”

“Yes?”

“Do you think I’m a total idiot?”

The telephone on Erlendur’s desk rang. It was Skarphedinn, the archaeologist.

“We’re getting there,” Skarphedinn said. “We could uncover the rest of the skeleton in two days or so.”

“Two days!” Erlendur roared.

“Or thereabouts. We haven’t found anything yet that looks like a weapon. You might think we’re being a little meticulous about it, but I think it’s better to do the job properly. Do you want to come and take a look?”

“Yes, I was on my way,” Erlendur said.

“Maybe you could buy some pastries on the way,” Skarphedinn said, and in his mind’s eye Erlendur could see his yellow fangs.

“Pastries?”

“Danish pastries,” Skarphedinn said.

Erlendur slammed down the phone, asked Elinborg to join him in Grafarholt and told Sigurdur Oli to go to Benjamin’s cellar to try to find something about the chalet that the merchant built but apparently lost all interest in after his life turned to misery.

On the way to Grafarholt, Erlendur, still thinking about people who went missing and were lost in snowstorms, remembered the story about Jon Austmann. He froze to death, probably in Blondugil in 1780. His horse was discovered with its throat slit, but all that was found of Jon was one of his hands.

It was inside a blue knitted mitten.

Simon’s father was the monster in all his nightmares.

It had been that way for as long as he could remember. He feared the monster more than anything else in his life, and when it attacked his mother all that Simon could think of was coming to her defence. He imagined the inevitable battle like an adventure story in which the knight vanquishes the fire-breathing dragon, but in his dreams Simon never won.

The monster in Simon’s dreams was called Grimur. It was never his father or Dad, just Grimur.

Simon was awake when Grimur tracked them down in the fish factory dormitory in Siglufjordur, and heard when he whispered to their mother how he was going to take Mikkelina up to the mountain and kill her. He saw his mother’s terror, and he saw when she suddenly seemed to lose all control, slammed herself against the bed head and knocked herself out. Grimur slowed down then. He saw when Grimur brought her round by repeatedly slapping her face. The boy could smell Grimur’s acrid stench and he buried his face in the mattress, so afraid that he asked Jesus to take him up to heaven, there and then.

He did not hear any more of what Grimur whispered to her. Just her whimpering. Repressed, like the sound of a wounded animal, and mingling with Grimur’s curses. Through a crack in his eyes he saw Mikkelina staring through the darkness in indescribable terror.

Simon had stopped praying to his God and stopped talking to his “good brother Jesus”, even though his mother said never to lose faith in him. Although convinced otherwise, Simon had stopped talking to his mother about it because he could tell from her expression that what he said displeased her. He knew that no one, least of all God, would help his mother to overcome Grimur. For all he had been told, God was the omnipotent and omniscient creator of heaven and earth, God had created Grimur like everyone else, God kept the monster alive and God made it attack his mother, drag her across the kitchen floor by the hair and spit on her. And sometimes Grimur attacked Mikkelina, “that fucking moron”, as he called her, beating her and mocking her, and sometimes he attacked Simon and kicked him or punched him, one time with such force that the boy lost one of his upper teeth and spat blood.

“My good brother Jesus, the friend of every child…”

Grimur was wrong about Mikkelina being retarded. Simon had a feeling that she was more intelligent than the rest of them put together. But she never said a word. He was certain she could talk but did not want to. Certain she had chosen silence, from the way she was just as scared of Grimur as the others were, perhaps more so because Grimur sometimes talked about how they ought to throw her on the rubbish dump with that pushchair contraption of hers, she was useless anyway and he was fed up with watching her eat his food without doing anything around the house except be a burden. He said she made them a laughing stock, the whole family and him too, because she was a moron.

Grimur made sure that Mikkelina could hear when he talked like this, and he laughed at her mother’s feeble attempts to curtail the abuse. Mikkelina didn’t mind him ranting at her and calling her names, but she didn’t want her mother to suffer for her sake. Simon could tell that when he looked at her. Mikkelina’s relationship with him had always been close, much closer than with little Tomas, who was more of a puzzle, more of a loner.

Their mother knew that Mikkelina was not retarded. She did regular exercises with her, but only when Grimur was not there to see it. Helped her to limber up her legs. Lifted her withered arm, which was twisted inwards and stiff, and rubbed her paralysed side with an ointment that she made from wild herbs from the hill. She even thought that Mikkelina would be able to walk one day. She put her arm around her and tottered with her back and forth across the floor, urging her on and encouraging her.