the public buildings. The major air campaigns had been abandoned after those frenetic months of the invasion in 1940, but because it was the seat of government York had taken more than its share of the sporadic Luftwaffe raids – the Brits called them 'tip and run' raids. So there were gaps in the streets, marked by stubs of walls and broken pipes, the rubble cleared away and piled up in vast mounds in the parks. Some of these bomb sites were four years old and were choked with greenery; the weeds loved the brick dust and the ash. Mary supposed glumly that when W-Day came the bombing would resume in Britain, just as it was about to resume, so she'd heard, in the heart of Germany, and that York and other cities would soon have fresh scars to add to the old.
Some of the changes wrought by the war seemed positively medieval. Every park, playing field and flower bed was given over to growing crops or raising pigs: it must have been five hundred years, Mary mused, since the farmyard had penetrated the city in such a way. And there was a pervasive atmosphere of neglect. The city was stripped of railings and lamp-posts, the metal turned over to the armaments industry. After nearly four years without a lick of fresh paint the homes and shops and offices looked shabby, slowly decaying, their blacked-out windows like closed eyes. Mary thought she saw a similar round-shouldered shabbiness in the people, in their patched-up clothes and shoes, now enduring the fourth year of a war that had become, worse than grinding, boring.
The most spectacular bomb site of all was the minster itself. In one week in the summer of 1942 the Luftwaffe had launched a series of particularly spiteful raids against the grand old building, evidently meaning to make a symbolic strike against Halifax's seat of power. When they reached it, Mary and Mackie stepped cautiously through the main entrance on the northern side, with flags of St George, Britain, the United States, Poland and France flying over their heads, and into the shadow of ruin. The central tower had been pretty much demolished, and the rest of the roof was blown in, the stone floors smashed to shrapnel. But the minster was still a working church. A small open-air altar had been set up beneath the Great West Window which had, by luck or a miracle, survived the bombing. But most of the interior, cleared of rubble and swept for unexploded shells, had been dug up to form allotments. Today squads of Land Girls toiled in the shadows of the broken walls.
Mary and Mackie sat on a fallen pillar in the shade of the ruined north transept, their feet in the long grass, and watched the girls working. They were cheerful enough, their young voices echoing from the stone walls.
Mary said, 'Looks as if they are fighting a losing battle against the rosebay willow herb.'
Mackie shrugged. 'I'm told it's more a symbolic effort than anything practical. Morale booster, you know. I mean it's rather too shady in here to grow anything worthwhile. Of course the archaeologists have been crawling all over this place since Hitler conveniently blew it up for them.'
'Well, they would. There are roots here going back to a Roman military headquarters, the centre of power in the whole of the north of England.'
'And now York finds itself the locus of a world empire. Remarkable how things come around. I wonder what archaeologists of the future will find of our time. A layer of ash, I suppose. Rubble and bones.'
'Geoffrey Cotesford visited the city many times, according to his memoir. In fact his first monastery was just outside the walls.'
'Ah, our friend Brother Geoffrey! I thought he might have done. So to business, Mary.' He dug out his pipe and began the usual rather theatrical business of filling it, shred by tobacco shred. It occurred to Mary that she hardly ever saw Mackie without the pipe. Perhaps he needed this prop for reassurance; perhaps he was less calm than his urbane British surface would have led her to believe. 'Tell me first how you are getting on with your counter-history. What was your hinge of fate?'
'Dunkirk,' she said immediately.
This was an exercise the two of them had set themselves. In an effort to delve into the minds of history- meddling Nazis, Mackie had proposed that they try to devise their own 'counter-histories'. If you had a Loom, what tweaks to history would you consider making? It was not so much the results that were of interest, he argued, but the habits of thinking and the types of research, a bit removed from the conventionally historical, that he wished to understand.
Mackie nodded sagely. 'Dunkirk. I should have guessed you would wish to spare your son the consequences of living through that horrendous defeat.'
She said fiercely, 'Let it be done to someone else's son, not mine.'
'Fair enough. How could that calamity have been averted?'
'If Hitler had hesitated…'
She had had access to remarkably thorough briefings. Mackie's MI-14 had moles that penetrated all the way, it seemed, to the top of the Nazi Party. And she had learned that in those dark days of May 1940, when the BEF and the remnant French forces were trapped on the beaches, it had been a full day before Guderian had been authorised to unleash his Panzers for the final assault and his resounding victory. The delay was obvious even to the allied soldiers on the beaches; Gary had spoken of it.
'There seems to have been a debate at all levels within the military and the Party,' she told Mackie. 'Guderian himself had some concerns about the nature of the ground they would have to cover. The blitzkrieg had advanced so fast he was short of proper intelligence.'
'Ah,' Mackie said around his pipe. 'Germans never did like a heavy pitch.'
'Meanwhile Guderian's superiors were well aware that France was not yet conquered. The BEF was beaten; so let it go, and keep back Guderian's forces, let them rest and re-equip for the French campaign. And then Hitler was still dreaming of peace with England. He thought that sparing the BEF from slaughter might demonstrate to you Brits that he was a civilised kind of guy after all. But in the end they concluded that the destruction of the BEF was too good an opportunity to miss.'
'So how would you make the change? You remember the rules we set. You're allowed to go back and whisper in one person's ear.' This was, from Geoffrey's evidence, how the Loom seemed to operate.
'I'd reach back to Hitler's court in those hours when they were debating whether to unleash Guderian. And I'd mess about with the head of Karl Ernst Krafft.'
'Who's he?'
'An astrologer.'
'I thought Hitler didn't believe in astrology.'
'Yes, but there are those around him who do, Himmler and Goebbels to name but two. In 1939 this guy Krafft sent a prediction to Himmler's intelligence service that there would be a bomb attempt against Hitler. Well, the prediction came true.'
Mackie snorted. 'Pure coincidence!'
'Of course. But it gave him an in at court. Mess with him, and you can influence at least two Nazi barons.'
'And if the decision about Guderian was so close, that might be enough to swing it. What would you say to him, though?'
Mary shrugged. 'Some suitable gobbledygook, couched in Aryanmythos phraseology. Hitler is a Taurus, which is supposedly ruled by the element earth. Hitler is a lion on land but lost in the water – so he should spare Britain, an island nation, and concentrate on the ground he can conquer, which after all stretches all the way to Russia. Something like that.'
'Um. So what next? If the BEF had been reprieved-'
'I think everything would have been different,' Mary said. She hesitated, then plunged on, 'I think the German invasion might not have happened at all.'
Mackie raised his eyebrows.
A different Dunkirk would have altered the mood on both sides of the Channel, she argued, and so affected the chains of decision-making that led up to the invasion itself. A saved BEF might have boosted British morale. Churchill might have survived politically – and then, emboldened, he might have forced through such belligerent actions as disabling the French fleet, to prevent it being absorbed by the German navy. As for the Germans, facing a tougher, more resolute Britain, and with the balance of power less in their favour on both land and sea, the invasion might have seemed that bit more daunting.
'They were always disunited at the command level,' she said. 'Each service seeking to shuffle off responsibilities onto the others. If the invasion had seemed more difficult, the infighting might have got that much worse.'
Mackie nodded, but looked doubtful. 'You know, actually I'm not sure how much difference the invasion has
