There was nothing.

There was something.

At the very back, his fingers brushed against an object small and smooth. He pulled it out. A small notebook bound in black leather, an eagle and swastika in gold lettering on the cover. He flicked through it. The Party diary for 1964. He slipped it into his pocket and replaced the drawers.

Outside, Buhler’s dog was going crazy, running from side to side along the water’s edge, staring across the Havel, whinnying like a horse. Every few seconds it would get down on its hind legs, before resuming its desperate patrol. He could see now that almost the whole of its right side was matted with dried blood. It paid no attention to March as he walked down to the lake.

The heels of his boots rang on the planks of the wooden jetty. Through the gaps between the rickety boards he could see the muddy water a metre below, lapping in the shallows. At the end of the jetty he stepped down into the boat. It rocked with his weight. There were several centimetres of rainwater on the aft deck, clogged with dirt and leaves, a rainbow of oil on the surface. The whole boat stank of fuel. There must be a leak. He stooped and tried the small door to the cabin. It was locked. Cupping his hands, he peered through the window, but it was too dark to see.

He jumped out of the boat and began retracing his steps. The wood of the jetty was weathered grey, except in one place, along the edge opposite the boat. Here there were orange splinters; a scrape of white paint. March was bending to examine the marks when his eye was caught by something pale gleaming in the water, close to the place where the jetty left the shore. He walked back and knelt, and by holding on with his left hand and stretching down as far as he could with his right, he was just able to retrieve it. Pink and chipped, like an ancient china doll, with leather straps and steel buckles, it was an artificial foot.

THE dog heard them first. It cocked its head, turned, and trotted up the lawn towards the house. At once, March dropped his discovery back into the water and ran after the wounded animal. Cursing his stupidity, he worked his way round the side of the house until he stood in the shadow of the towers and could see the gate. The dog was leaping up at the iron work, grunting through its muzzle. On the other side, March could make out two figures standing looking at the house. Then a third appeared with a large pair of bolt-cutters which he clamped on to the lock. After ten seconds of pressure, it gave way with a loud crack.

The dog backed away as the three men filed into the grounds. Like March, they wore the black uniforms of the SS. One seemed to take something from his pocket and walked towards the dog, hand outstretched, as if offering it a treat. The animal cringed. A single shot exploded the silence, echoing round the grounds, sending a flock of rooks cawing into the air above the woods. The man bolstered his revolver and gestured at the corpse to one of his companions, who seized it by the hind legs and dragged it into the bushes.

All three men strode towards the house. March stayed behind the pillar, slowly edging round it as they came up the drive, keeping himself out of sight. It occurred to him that he had no reason to hide. He could tell the Gestapo men he had been searching the property, that he had not received Jaeger’s message. But something in their manner, in the casual ruthlessness with which they had disposed of the dog, warned him against it. They had been here before.

As they came closer, he could make out their ranks. Two Sturmbannfuhrer and an Obergruppenfuhrer — a brace of majors and a general. What matter of state security could demand the personal attention of a full Gestapo general? The Obergruppenfuhrer was in his late fifties, built like an ox, with the battered face of an ex-boxer. March recognised him from the television, from newspaper photographs.

Who was he?

Then he remembered. Odilo Globocnik. Familiarly known throughout the SS as Globus. Years ago he had been Gauleiter of Vienna. It was Globus who had shot the dog.

“You — ground floor,” said Globus. “You — check the back.”

They drew their guns and disappeared into the house. March waited half a minute, then set off for the gate. He skirted the perimeter of the garden, avoiding the drive, picking his way instead, almost bent double, through the tangled shrubbery. Five metres from the gate, he paused for breath. Built into the right-hand gatepost, so discreet it was scarcely noticeable, was a rusty metal container — a mail box — in which rested a large brown package.

This is madness, he thought. Absolute madness.

He did not run to the gate: nothing, he knew, attracts the human eye like sudden movement. Instead he made himself stroll from the bushes as if it were the most natural thing in the world, tugged the package from the mail box, and sauntered out of the open gate.

He expected to hear a shout from behind him, or a shot. But the only sound was the rustle of the wind in the trees. When he reached his car, he found his hands were shaking.

“Why do we believe in Germany and the Fuhrer?”

“Because we believe in God, we believe in Germany which He created in His world, and in the Fuhrer, Adolf Hitler, whom He has sent us.”

“Whom must we primarily serve?”

“Our people and our Fuhrer, Adolf Hitler.”

“Why do we obey?”

“From inner conviction, from belief in Germany, in the Fuhrer, in the Movement and the SS, and from loyalty.”

“Good!” The instructor nodded. “Good. Reassemble in thirty-five minutes on the south sports field. Jost: stay behind. The rest of you: dismissed!”

With their cropped hair and their loose-fitting light-grey drill uniforms, the class of SS cadets looked like convicts. They filed out noisily, with a scraping of chairs and a stamping of boots on the rough wooden floor. A large portrait of the late Heinrich Himmler smiled down on them, benevolently. Jost looked forlorn, standing to attention, alone in the centre of the classroom. Some of the other cadets gave him curious glances as they left. It had to be Jost, you could see them thinking. Jost: the queer, the loner, always the odd one out. He might well be due another beating in the barracks tonight.

The instructor nodded towards the back of the classroom. “You have a visitor.”

March was leaning against a radiator, arms folded, watching. “Hello again, Jost,” he said.

They walked across the vast parade ground. In one corner, a batch of new recruits was being harangued by an SS Hauptscharfuhrer. In another, a hundred youths in black tracksuits stretched, twisted and touched their toes in perfect obedience to shouted commands. Meeting Jost here reminded March of visiting prisoners in jail. The same institutionalised smell, of polish and disinfectant and boiled food. The same ugly concrete blocks of buildings. The same high walls and patrols of guards. Like a KZ, the Sepp Dietrich Academy was both huge and claustrophobic; an entirely self-enclosed world.

“Can we go somewhere private?” asked March.

Jost gave him a contemptuous look. There is no privacy here. That’s the point.” They took a few more paces. “I suppose we could try the barracks. Everyone else is eating.”

They turned, and Jost led the way into a low, grey-painted building. Inside, it was gloomy, with a strong smell of male sweat. There must have been a hundred beds, laid out in four rows. Jost had guessed correctly: it was deserted. His bed was two-thirds of the way down, in the centre. March sat on the coarse brown blanket and offered Jost a cigarette.

“It’s not allowed in here.”

March waved the packet at him. “Go ahead. Say I ordered you.”

Jost took it, gratefully. He knelt, opened the metal locker beside the bed, and began searching for something to use as an ashtray. As the door hung open, March could see inside: a pile of paperbacks, magazines, a framed photograph