His mobile phone was linked to his laptop by a wireless connection that worked over distances of fifty feet or so-even through walls, which might be useful later. Now he used the laptop to access the central processing unit of the Kremlin's phone system. The system had tamper detectors-but they did not register an alarm if the company's own phone line and code were used.

First he closed down every phone on the site except the one on the desk in reception.

Next, he diverted all calls into and out of the Kremlin to his mobile. He had already programmed his laptop to recognize the numbers likeliest to come up, such as Toni Gallo's. He would be able to answer the calls himself, or play recorded messages to the callers, or even redirect calls and eavesdrop on the conversations.

Finally, he caused every phone in the building to ring for five seconds. That was just to get the attention of the security guards.

Then he disconnected and sat on the edge of his chair, waiting.

He was fairly sure what would happen next. The guards had a list of people to call in the event of different emergencies. Their first action now should be to call the phone company.

He did not have to wait long. His mobile rang. He left it, watching his laptop. After a moment, a message appeared on the screen saying: "Kremlin calls Toni."

That was not what he had expected. They should have called Hibernian first. Nevertheless, he was prepared. Quickly, he activated a recorded message. The security guard who was trying to reach Toni Gallo heard a female voice saying that the mobile he was calling might be switched off or out of range, and advising him to try later. The guard hung up.

Kit's phone rang again almost immediately. Kit hoped the guards would now be calling the phone company, but once again he was disappointed. The screen said "Kremlin calls RPHQ." The guards were ringing regional police headquarters at Inverburn. Kit was happy for the police to be informed. He redirected the call to the correct number and listened in.

"This is Steven Tremlett, security guard supervisor at Oxenford Medical, calling to report an unusual incident."

"What's the incident, Mr. Tremlett?"

"No big emergency, but we have a problem with our phone lines, and I'm not sure the alarms will work."

"I'll log it. Can you get your phones fixed?"

"I'll call out a repair crew, but God knows when they'll get here, being Christmas Eve."

"Do you want a patrol to call?"

"It wouldn't do any harm, if they've not much on."

Kit hoped the police would pay a visit to the Kremlin. It would add conviction to his cover.

The policeman said, "They'll be busy later, when the pubs chuck out, but it's quiet the noo."

"Right. Tell them I'll give them a cup of tea."

They hung up. Kit's mobile rang a third time and the screen said: "Kremlin calls Hibernian." At last, he thought with relief. This was the one he had been waiting for. He touched a button and said into his phone, "Hibernian Telecom, can I help you?"

Steve's voice said, "This is Oxenford Medical, we have a problem with our phone system."

Kit exaggerated his Scots accent to disguise his voice. "Would that be Greenmantle Road, Inverburn?"

Aye.

"What's the problem?"

"All the phones are out except this one. The place is empty, of course, but the thing is, the alarm system uses the phone lines, and we need to be sure that's working properly."

At that point, Kit's father walked into the room.

Kit froze, paralyzed with fear and terror, as if he were a child again. Stanley looked at the computer and the mobile phone and raised his eyebrows. Kit pulled himself together. He was no longer a kid frightened of a reprimand. Trying to make himself calm, he said into the phone, "Let me call you back in two minutes." He touched the keyboard of his laptop, and the screen went dark.

"Working?" his father said.

"Something I have to finish."

"At Christmas?"

"I said I would deliver this piece of software by December the twenty-fourth."

"By now your customer will have gone home, like all sensible folk."

"But his computer will show that I e-mailed the program to him before midnight on Christmas Eve, so he won't be able to say I was late."

Stanley smiled and nodded. "Well, I'm glad you're being conscientious." He stood silent for several seconds, obviously having something else to say. A typical scientist, he thought nothing of long pauses in conversation. The important thing was precision.

Kit waited, trying to hide his frantic impatience. Then his mobile rang.

"Shit," he said. "Sorry," he said to his father. He checked his screen. This was not a diverted Kremlin call, but one directly to his mobile from Hamish McKinnon, the security guard. He could not ignore it. He pressed the phone hard to his ear, so that the voice of the caller would not leak out to be heard by his father. "Yes?"

Hamish said excitedly, "All the phones here have gone kaput!"

"Okay, that's expected, it's part of the program."

"You said to tell you if anything unusual-"

"Yes, and you were right to ring me, but I have to hang up now. Thank you." He ended the call.

His father spoke. "Is our quarrel really behind us now?"

Kit resented this kind of talk. It suggested that the two disputants must be equally guilty. But he was desperate to get back on the phone, so he said, "I think so, yes."

"I know you think you've been unjustly treated," his father said, reading his mind. "I don't see your logic, but I accept that you believe it. And I, too, feel that I was unfairly done by. But we have to try to forget that, and be friends again."

"So says Miranda."

"And I'm just not sure you have put it behind you. I sense you holding something back."

Kit tried to keep his face wooden so that his guilt would not show. "I'm doing my best," he said. "It's not easy."

Stanley seemed satisfied. "Well, I can't ask any more of you than that," he said. He put his hand on Kit's shoulder, bent down, and kissed the top of his head. "I came to tell you suppers almost ready."

"I'm nearly done. I'll come down in five minutes."

"Good." Stanley went out.

Kit slumped in his chair. He was shaking with a mixture of shame and relief. His father was shrewd, and suffered no illusions-yet Kit had survived the interrogation. But it had been ghastly while it lasted.

When his hands were steady enough, he dialed the Kremlin again.

The phone was picked up immediately. Steve Tremlett's voice said, "Oxenford Medical."

"Hibernian Telecom here." Kit remembered to change his voice. He had not known Tremlett well, and nine months had passed since he had left Oxenford Medical, so it was unlikely Steve would remember his voice; but he was not going to take the chance. "I can't access your central processing unit."

"I'm not surprised. That line must be down also. You'll have to send someone."

This was what Kit wanted, but he was careful not to sound eager. "It's going to be difficult to get a repair crew out to you at Christmas."

"Don't give me that." Steve's voice betrayed a touch of anger. "You guarantee to attend to any fault within four hours, every day of the year. That's the service we pay you for. It's now seven-fifty-five p.m., and I'm logging this call."

"All right, keep your shirt on. I'll get a crew to you as soon as possible."

"Give me a time estimate, please."

"I'll do my best to get them to you by midnight."

"Thank you, we'll be waiting." Steve hung up.

Kit put down his mobile. He was perspiring. He wiped his face with his sleeve. So far, it had all gone perfectly.