As the teenager remembered it, it took an age for them to die. Stunned silence in the square, as if the whole village knew now, knew that this was no mere check of identity papers. More orders were barked. The men, separated from the women and children, were marched off to Prudhomme’s barn, everyone else shepherded into the church. The square grew empty, except for a dozen or so soldiers, rifles slung over their shoulders. They chatted, kicked up dust and stones, shared jokes and cigarettes. One of them went into the bar and switched the radio on. Jazz music filled the air, competing with the rustle of leaves as a breeze twisted the corpses in the trees.

‘It was strange,’ the girl later said. ‘I stopped seeing them as dead bodies. It was as if they’d become something else, parts of the trees themselves.’

Then the explosion, smoke and dust billowing from the church. A moment’s silence, as though a vacuum had been created in the world, then screams, followed immediately by machine-gun fire. And when it finally stopped, she could still hear it. Because it wasn’t just inside the church: it was in the distance, too.

Prudhomme’s barn.

When she was finally found - by people from surrounding villages - she was naked except for a shawl she had found in a trunk. The shawl had belonged to her grandmother, dead the previous year. But she was not alone in escaping the massacre. When the soldiers had opened fire in Prudhomme’s barn, they’d aimed low. The first row of men to fall had been wounded in the lower body, and the bodies which fell on them shielded them from further fire.

When straw was strewn over the mound and set alight, they’d waited as long as they could before starting to claw their way out from beneath, expecting at any moment to be shot. Four of them made it, two with their hair and clothes on fire, one dying later from his wounds.

Three men, one teenage girl: the only survivors.

The death toll was never finalised. No one knew how many visitors had been in Villefranche that day, how many refugees could be added to the count. A list was compiled of over seven hundred names, people who had most likely been killed.

Rebus sat at his desk and rubbed his eyes with his knuckles. The teenage girl was still alive, a pensioner now. The male survivors were all dead. But they’d been alive for the Bordeaux trial in 1953. He had summaries of their evidence. The summaries were in French. A lot of the material sitting on his desk was French, and Rebus didn’t speak French. That was why he’d gone to the Modern Languages department at the university and found someone who could. Her name was Kirstin Mede, and she lectured in French, but also had a working knowledge of German, which was handy: the documents which weren’t in French were in German. He had a onepage English summary of the trial proceedings, passed on from the Nazi hunters. The trial had opened in February 1953 and lasted just under a month. Of seventy five men identified as having been part of the German force at Villefranche, only fifteen were present - six Germans and nine French Alsatians. Not one of them was an officer. One German received the death sentence, the others jail terms of between four and twelve years, but they were all released as soon as the trial finished. Alsace hadn’t been enjoying the trial, and in a bid to unite the nation, the government had passed an amnesty. The Germans, meantime, were said to have already served their sentences.