The timber cabin was isolated. If only it would snow again, that would help to cover their tracks, but there was no sign of snow. Once outside Max sniffed the air, anxious to know if the smoke from the stove would carry far enough to alert a search party. Well at least choosing this remote shelter had proved right. It was a hut for the cowherds when in summer the cattle moved to the higher grazing. From this elevated position they could see the valley along which they had come. Here and there, lights indicated a cluster of houses in this dark and lonely landscape. It was good country for moving at night but when daylight came it would work against them: they'd be too damned conspicuous. Max cursed the bad luck that had dogged the whole movement. By this time they should have all been across the border, skin intact and sound asleep after warm baths and a big meal and lots to drink.

Max looked up. A few stars were sprinkled to the east but most of the sky was dark. If the thick overcast remained there, blotting out the sun, it would help, but it wasn't low enough to inconvenience the helicopters. The chopper would be back.

'We'll keep to the high ground,' said Max. These paths usually make good going. They keep them marked and maintained for summertime walkers.' He set off at a good pace to show Bernard that he was fit and strong, but after a little while he slowed.

For several kilometres the beech forest blocked off their view of the valley. It was dark walking under the trees, like being in a long tunnel. The undergrowth was dead and crisp brown fern crunched under their feet. As the trail climbed the snow was harder. Trees shielded the footpath and upon the hard going they made reasonably good speed. They had walked for about an hour and a half, and were into the evergreens, when Max called a halt. They were higher now, and through a firebreak in the regimented plantations they could see the twist of the next valley ahead of them. Beyond that, through a dip in the hills, a lake shone faintly in the starlight, its water heady with foam, like good German beer. It was difficult to guess how far away it was. There were no houses in sight, no roads, no power lines, nothing to give the landscape a scale. Trees were no help: these fir trees came in all shapes and sizes.

'Five minutes,' said Max. He sank down in a way that revealed his true condition and wedged his backside into the roots of a tree. Alongside him there was a bin for feeding the deer: the herds were cosseted for the benefit of the hunters. Resting against the bin, Max's head slumped to one side. His face was shiny with exertion and he looked all in. Blood had seeped through the paper and there was a patch of it on the sleeve of the thick overcoat. Better to press on than to try to fix it here.

Bernard took out the field-glasses, snapped the protective covers from the lenses, and looked more carefully at the lake. It was the haze upon the water that produced the boiling effect and softened its outline.

'How are your feet?' said Max.

'Okay, Max.'

'I have spare socks.'

'Don't mother me, Max.'

'Do you know where we are?'

'Yes, we're in Germany,' he said, still staring through the glasses.

'Are you sure?'

'But that's our lake, Max,' Bernard affirmed. 'Mouse Lake.'

'Or Moulting Lake,' suggested Max.

'Or even Turncoat Lake,' said Bernard, suggesting a third possible translation.

Max regretted his attempt at levity. 'Something like that,' he said. He resolved to stop treating Bernard like a child. It was not so easy: He'd known him so long it was difficult to remember that he was a grown man with a wife and children. And what a wife! Fiona Samson was one of the rising stars of the Department. Some of the more excitable employees were saying that she was likely to wind up as the first woman to hold the Director-General's post. Max found it an unlikely prospect. The higher echelons of the Department were reserved for a certain sort of Englishman, all of whom seemed to have been at school together.

Max Busby often wondered why Fiona had married Bernard. He was no great prize. If he got the German Desk in London it would be largely due to his father's influence, and he'd go no further. Whoever got the German Desk would come under Bret Rensselaer's direction, and Bret wanted a stooge there. Max wondered if Bernard would adapt to a yes-man role.

Max took the offered field-glasses to have a closer look at the lake. Holding them with only one hand meant resting against the tree. Even holding his arm up made him tremble. He wondered if it was septic: he'd seen wounds go septic very quickly but he put the thought to the back of his mind and concentrated on what he could see. Yes, that was the Mause See: exactly as he remembered it from the map. Maps had always been a fetish with him, sometimes he sat looking at them for hours on end, as other men read books. They were not only maps of places he knew, or places he'd been or places he might have to visit, but maps of every kind. When someone had given him the Times Atlas of the Moon, Max took it on vacation and it was his sole reading matter.

'We must come in along the southern shore,' said Bernard, 'and not too close to the water or we'll find ourselves in some Central Committee member's country cottage.'

'A boat might be the best way,' Max suggested, handing the glasses back.

'Let's get closer,' said Bernard, who didn't like the idea of a boat. Too risky from every point of view. Bernard was not very skilled with a set of oars and Max certainly couldn't row. In winter a boat might be missed from its moorings, and even if the water was glassy smooth – which it wouldn't be – he didn't fancy being exposed to view like that. It was an idea typical of Max, who liked such brazen methods and had proved them in the past. Bernard hoped Max would forget that idea by the time they'd covered the intervening countryside. It was a long hike. It looked like rough going and soon it would be dawn.

Bernard felt like saying something about the two men with whom they had been supposed to rendezvous yesterday afternoon, but he kept silent. There was nothing to be said; they had gone into the bag. Max and Bernard had been lucky to get away. Now the only important thing was for them to get back. If they didn't, the whole operation – 'Reisezug' – would have proved useless: more than three months of planning, risks and hard work wasted. Bernard's father was running the operation, and he would be desolated. To some extent, his father's reputation depended upon him.

Bernard got up and dusted the soil from his trousers. It was sandy and had a strange musty smell.

'It stinks, right?' said Max, somehow reading his thoughts. 'The North German Plain. Goddamned hilly for a plain, I'd say.'

'German Polish Plain they called it when I was at school,' said Bernard.

'Yeah, well, Poland has moved a whole lot closer to here since I did high school geography,' said Max, and smiled at his little joke. 'My wife Helma was born not far from here. Ex-wife that is. Once she got that little old US passport she went off to live in Chicago with her cousin.'

As Bernard helped Max to his feet he saw the animal. It was lying full-length in a bare patch of ground behind the tree against which he'd rested. Its fur was caked with mud and it was frozen hard. He peered more closely at it. It was a fully grown hare, its foot tight in a primitive wire snare. The poor creature had died in agony, gnawing its trapped foot down to the bone but lacking either the energy or the desperate determination required for such a sacrifice.

Max came to look too. Neither man spoke. For Max it seemed like a bad omen and Max had always been a great believer in signs. Still without speaking they both trudged on. They were tired now and the five minutes' break that had helped their lungs had stiffened their muscles. Max found it difficult to hold his arm up, but if he let it hang it throbbed and bled more.