After the liberation De Gaulle's government held on to internees from many countries in officially closed centres to hide collaboration. The papers, part of a cache of 12,000 photocopied illegally by an Austrian-born Jew, reveal the extent to which French officials collaborated with their fleeing Nazi occupiers even as their country was being liberated. They also show that, when the war was over, France went to extraordinary lengths to hide as much evidence of that collaboration as possible.