He found Svensson's wallet in the inner pocket of a sports jacket and added it to the inventory of confiscated items. Svensson had a membership card to the Friskis&Svettis gym chain, a Handelsbanken ATM card, and just under 400 kronor in cash. He found Johansson's handbag and spent a few minutes going through its contents. She also had a card to Friskis&Svettis, an ATM card, a Konsum co-op loyalty card, and a membership card to something called Club Horizon, which had a globe as its logo. He found about 2,500 kronor in cash, a relatively large but not unreasonable sum, given that they were on their way out of Stockholm for the holiday weekend. That there was money in their wallets did reduce the likelihood of their deaths being robbery-related.

"From Johansson's handbag found on the shelf above the coatrack in the hall. One ProPlan pocket diary, a separate address book, and a leather-bound black notebook."

Holmberg took another break for coffee and noted that for a change he had so far found nothing embarrassing or intimate in the Svensson-Johansson couple's home - no hidden sex aids, no scandalous underwear, no drawer full of pornographic videos, no marijuana cigarettes or any sign at all of other illegal substances. They seemed to be a normal couple, possibly (from a police standpoint) somewhat duller than average.

Finally he returned to the bedroom and sat down at the desk. He opened the top drawer. He soon found that the desk and shelf unit next to it contained extensive source and reference materials for Johansson's doctoral thesis "From Russia with Love." The material was neatly arranged, exactly like a police report, and he lost himself for a while in certain sections of the text. Mia Johansson was good enough to be on the force, he told himself. One section of the bookshelf was only half full and seemed to contain material belonging to Svensson, mainly press clippings of his own articles and others on subjects that had interested him.

Holmberg spent a while going through the computer and found that it held almost five gigabytes, everything from software to letters and downloaded articles and PDF files. Certainly he was not going to be able to read through it in one evening. He added the computer and assorted CDs and a Zip drive with about thirty disks to the confiscated items.

Then he sat brooding for a while. The computer contained Johansson's work, as far as he could see. Svensson was a journalist, and a computer ought to be his most important tool, but he did not even get email on the desktop. So he must have had a computer somewhere else. Holmberg got up and went through the apartment, thinking. In the hall there was a black backpack with some notebooks that belonged to Svensson and an empty compartment for a computer. He could not find a laptop anywhere in the apartment. He took the keys and went down to the courtyard and searched Johansson's car and then the apartment's basement storage area. He found no computer there either.

The strange thing about the dog is that it did not bark, my dear Watson.

He made a note that at least one computer seemed to be missing.

Bublanski and Faste met Ekstrom in his office at 6:30 p.m., soon after they returned from Lundagatan. Andersson, after calling in, had been sent to Stockholm University to interview Johansson's tutor about her doctoral thesis. Holmberg was still in Enskede, and Modig was running the crime scene investigation at Odenplan. Ten hours had passed since Bublanski was appointed leader of the investigative team, and seven hours since the hunt for Salander had begun.

"And who is Miriam Wu?" Ekstrom said.

"We don't know much about her yet. She has no criminal record. It'll be Faste's task to start looking for her first thing tomorrow morning. But as far as we could see, there's no sign that Salander lives at Lundagatan. For one thing, all the clothes in the wardrobe were the wrong size for her."

"And they weren't your typical clothes, either," Faste said.

"Meaning what?" Ekstrom asked.

"Well, let's just say they weren't the type of clothes you'd buy for Mother's Day."

"We know nothing about the Wu woman at present," Bublanski said.

"How much do you have to know, for God's sake? She has a closet full of whore outfits."

"Whore outfits?" Ekstrom said.

"Black leather, patent leather, corsets, and fetishist whips and sex toys in a drawer. They didn't look like cheap stuff, either."

"Are you saying that Miriam Wu is a prostitute?"

"We know nothing about Froken Wu at this stage," Bublanski said a little more sharply.

"One of Salander's social welfare reports indicated a few years ago that she was involved in prostitution," Ekstrom said.

"And social welfare usually knows what they're talking about," Faste said.

"The social welfare report was not supported by any police reports," Bublanski said. "There was an incident in Tantolunden when she was sixteen or seventeen; she was in the company of a considerably older man. Later the same year she was arrested for being drunk in public. Again with a considerably older man."

"You mean that we shouldn't draw conclusions too hastily," Ekstrom said. "OK. But it strikes me that Johansson's thesis having been on trafficking and prostitution, there's a possibility that in her work she made contact with Salander and this Wu and in some way provoked them, and that this might somehow constitute a motive for murder."

"Johansson might have got in touch with Salander's guardian and started the whole merry-go-round," Faste said.

"That's possible," Bublanski said. "But the investigation will have to document that. The important thing for now is to find Salander. She's obviously no longer living on Lundagatan. That means we also have to find Wu and discover how she came to live in that apartment and what her relationship with Salander is."

"And how do we find Salander?"

"She's out there somewhere. The problem is that the only address she ever had was on Lundagatan. No change of address was filed."

"You're forgetting that she was also admitted to St.Stefan's and lived with various different foster families."

"I'm not forgetting." Bublanski checked his papers. "She had three separate foster families when she was fifteen. It didn't go well. From just before she turned sixteen until she was eighteen, she lived with a couple in Hagersten. Fredrik and Monika Gullberg. Andersson is going out to see them this evening when he's finished at the university."

"How are we doing on the press conference?" Faste said.

The mood in Berger's office at 7:00 that evening was grim. Blomkvist had been sitting silent and almost immobile ever since Inspector Bublanski had left. Eriksson had cycled over to Lundagatan to watch what was going on there. She reported that no-one seemed to have been arrested and that traffic was flowing once again. Cortez had called in to tell them that the police were now looking for a second unnamed woman. Berger told him the name.

Berger and Eriksson had talked through what needed to be done, but the immediate situation was complicated by the fact that Blomkvist and Berger knew what role Salander had played in the denouement of the Wennerstrom affair - in her capacity as elite-level hacker she had been Blomkvist's secret source. Eriksson had no knowledge of this and had never even heard Salander's name mentioned. So the conversation occasionally lapsed into cryptic silences.

"I'm going home," Blomkvist said, getting up abruptly. "I'm so tired I can't think straight. I've got to get some sleep. Tomorrow being Good Friday, I plan to sleep and go through papers. Malin, can you work over Easter?"

"Do I have any choice?"

"No. We'll start at noon on Saturday. Could we work at my place rather than in the office?"

"That would be fine."

"I'm thinking of revamping the approach that we decided on this morning. Now it's no longer just a matter of trying to find out if Dag's expose had something to do with the murders. It's about working out, from the material, who murdered Dag and Mia."

Eriksson wondered how they were going to go about doing any such thing, but she said nothing. Blomkvist waved goodbye to the two of them and left without another word.

At 7:15 Inspector Bublanski reluctantly followed Prosecutor Ekstrom onto the podium in the police press centre. Bublanski had absolutely no interest in being in the spotlight in front of a dozen TV cameras. He was almost panic-stricken to be the focus of such attention. He would never get used to or begin to enjoy seeing himself on television.

Ekstrom, on the other hand, moved with ease, adjusted his glasses, and adopted a suitably serious expression. He let the photographers take their pictures before he raised his hands and asked for quiet.

"I'd like to welcome you all to this somewhat hastily arranged press conference regarding the murders in Enskede late last night. We have some more information to share with you. My name is Prosecutor Richard Ekstrom, and this is Criminal Inspector Jan Bublanski of the County Criminal Police Violent Crimes Division, who is leading the investigation. I have a statement to read, and then there will be an opportunity for you to ask questions."

Ekstrom looked at the assembled journalists. The murders in Enskede were big news, and getting bigger. He was pleased to note that Aktuellt, Rapport, and TV4 were all there, and he recognized reporters from the TT wire service and the evening and morning papers. There were also quite a few reporters he did not recognize.

"As you know, two people were murdered in Enskede last night. A weapon was found at the crime scene, a Colt.45 Magnum. Today the National Forensics Laboratory established that this gun was the murder weapon. The owner of the weapon was identified, and we went looking for him today."

Ekstrom paused for effect.

"At 4:15 this afternoon the owner of the weapon was found dead in his apartment in the vicinity of Odenplan. He had been shot. He is believed to have been dead at the time of the killings in Enskede. The police" - Ekstrom here gestured towards Bublanski - "have reason to believe that the same person was responsible for all three murders."

A murmur broke out among the reporters. Several of them began talking in low voices on their mobile telephones. "Have you got a suspect?" a reporter from Swedish Radio called out.

Ekstrom raised his voice. "If you would refrain from interrupting my statement, we'll get to that. This evening a person has been named whom the police want to question in connection with these three murders."

"Will you give us his name, please?"

"It's not a he, but a she. The police are looking for a twenty-six-year-old woman who has a connection to the owner of the weapon, and whom we know to have been at the scene of the murders in Enskede."

Bublanski frowned and then looked sullen. They had reached the point in the agenda over which he and Ekstrom had disagreed, namely the question of whether they should name their suspect.

Ekstrom had maintained that according to all available documentation, Salander was a mentally ill, potentially violent woman and that something had apparently triggered a murderous rage. There was no guarantee that the violence was at an end, and therefore it was in the public interest that she be named and apprehended as soon as possible.

Bublanski held that there was reason to wait at least for results of the technical examination of Bjurman's apartment before the investigative team committed itself unequivocally to one approach. But Ekstrom had prevailed.

Ekstrom held up a hand to interrupt the buzzing of the assembled reporters. The revelation that a woman was being sought for three murders would go off like a bomb. He passed the microphone to Bublanski, who cleared his throat twice, adjusted his glasses, and stared hard at the paper with the wording they had agreed on.

"The police are searching for a twenty-six-year-old woman by the name of Lisbeth Salander. A photograph from the passport office will be distributed. We do not know where she is at present, but we believe that she is in the greater Stockholm area. The police would like the public's assistance in finding this woman as soon as possible. Lisbeth Salander is four feet eleven inches tall, with a slim build."

He took a deep, nervous breath. He could feel the dampness under his arms.

"Lisbeth Salander has previously been in the care of a psychiatric clinic and is regarded as dangerous to herself and to the public. We would emphasize that we cannot say unequivocally that she is the killer, but circumstances dictate that we question her immediately to ascertain what knowledge she may have about the murders in Enskede and at Odenplan."

"You can't have it both ways," shouted a reporter from an evening paper. "Either she's a murder suspect or she isn't."

Bublanski gave Ekstrom a helpless look.

"The police are investigating on a broad front, and of course we're looking at various scenarios. But there is reason to suspect the woman we have named, and the police consider it extremely urgent that she is taken into custody. She is a suspect due to forensic evidence which emerged during the investigation of the crime scene."

"What sort of evidence?" someone in the crowded room immediately asked.

"We are not going to go into it."

Several reporters started talking at once. Ekstrom held up his hand and pointed to a reporter from Dagens Eko. He had dealt with him before and regarded him as objective.

"Inspector Bublanski said that Froken Salander had been in a psychiatric clinic. Why was that?"

"This woman had a...  a troubled upbringing and encountered over the years a number of problems. She is under guardianship, and the person who owned the weapon was her guardian."

"Who is he?"

"The individual who was shot in his apartment at Odenplan. At present we are withholding his name until his next of kin are notified."