"Good," Flick said briskly. "Show Jelly where to place the charges."

The three of them went to work. Greta unwrapped the wax-paper packets of yellow plastic explosive while Flick cut the fuse cord into lengths. It burned at one centimeter per second. "I'll make all the fuses three meters long," Flick said. "That will give us exactly five minutes to get out." Jelly assembled the fire train: fuse, detonator, and firing cap.

Flick held a flashlight while Greta molded the charges to the frames at the vulnerable places and Jelly stuck the firing cap into the soft explosive.

They worked fast. In five minutes all the equipment was covered with charges like a rash. The fuse cords led to a common source, where they were loosely twisted together, so that one light would serve to ignite them all.

Jelly took out a thermite bomb, a black can about the size and shape of a tin of soup, containing finely powdered aluminum oxide and iron oxide. It would burn with intense heat and fierce flames. She took off the lid to reveal two fuses, then placed it on the ground behind the MDF.

Greta said, "Somewhere in here are thousands of cards showing how the circuits are connected. We should burn them. Then it will take the repair crew two weeks, rather than two days, to reconnect the cables."

Flick opened the cupboard and found four custom- made card holders containing large diagrams, neatly sorted by labeled file dividers. "Is this what we're looking for?"

Greta studied a card by the light of her flashlight. "Yes."

Jelly said, "Scatter them around the thermite bomb. They'll go up in seconds."

Flick threw the cards on the floor in loose piles.

Jelly placed an oxygen-generating pack on the floor at the blind end of the room. "This will make the fire hotter," she said. "Ordinarily, we could only burn the wooden frames and the insulation around the cables, but with this, the copper cables should melt."

Everything was ready.

Flick shone her flashlight around the room. The outer walls were ancient brick, but the inner walls between the rooms were light wooden partitions. The explosion would destroy the partition walls and the fire would spread rapidly to the rest of the basement.

Five minutes had passed since the lights went out.

Jelly took out a cigarette lighter.

Flick said, "You two, make your way outside the building. Jelly, on your way, go into the generating room and blow a hole in the fuel line, where I showed you."

"Got it."

"We meet up at Antoinette's."

Greta said anxiously, "Where are you going?"

"To find Ruby."

Jelly warned, "You have five minutes."

Flick nodded.

Jelly lit the fuse.

W H E N D E T E R PASSED from the darkness of the basement into the half-light of the stairwell, he noticed that the guards had gone from the entrance. No doubt they were fetching help, but the ill discipline infuriated him. They should have remained at their post.

Perhaps they had been forcibly removed. Had they been taken away at gunpoint? Was an attack on the chteau already under way?

He ran up the stairs. On the ground floor, there were no signs of battle. The operators were still working: the phone system was on a separate circuit from the rest of the building's electricity, and there was still enough light coming through the windows for them to see their switchboards. He ran through the canteen, heading for the rear of the building, where the maintenance workshops were located, but on the way he looked into the kitchen and found three soldiers in overalls staring at a fuse box. "There's a power cut in the basement," Dieter said.

"I know," said one of the men. He had a sergeant's stripes on his shirt. "All these wires have been cut."

Dieter raised his voice. "Then get your tools out and reconnect them, you damn fool!" he said. "Don't stand here scratching your stupid head!"

The sergeant was startled. "Yes, sir," he said.

A worried-looking young cook said, "I think it's the electric oven, sir."

"What happened?" Dieter barked.

"Well, Major, they were cleaning behind the oven, and there was a bang-"

"Who? Who was cleaning?"

"I don't know, sir."

"A soldier, someone you recognized?"

"No, sir... just a cleaner."

Dieter did not know what to think. Clearly the chteau was under attack. But where were the enemy? He left the kitchen, went to the stairwell, and ran up toward the offices on the upper floor.

As he turned at the bend in the stairs, something caught his eye, and he looked back. A tall woman in a cleaner's overall was coming up the stairs from the basement, carrying a mop and a bucket.

He froze, staring at her, his mind racing. She should not have been there. Only Germans were allowed into the basement. Of course, anything could have happened in the confusion of a power cut. But the cook had blamed a cleaner for the power cut. He recalled his brief conversation with the supervisor of the switchboard girls. None of them was new to the job-but he had not asked about the Frenchwomen cleaners.

He came back down the stairs and met her at ground level. "Why were you in the basement?" he asked her in French.

"I went there to clean, but the lights are out."

Dieter frowned. She spoke French with an accent that he could not quite place. He said, "You're not supposed to go there."

"Yes, the soldier told me that, they clean it themselves, I didn't know."

Her accent was not English, Dieter thought. But what was it? "How long have you worked here?"

"Only a week, and I've always done upstairs until today."

Her story was plausible, but Dieter was not satisfied. "Come with me." He took her arm in a firm grip. She did not resist as he led her through to the kitchen.

Dieter spoke to the cook. "Do you recognize this woman?"

"Yes, sir. She's the one who was cleaning behind the oven."

Dieter looked at her. "Is that true?"

"Yes, sir, I'm very sorry if I damaged something."