Fresh proof that the Nazis set up fake auctions and phoney paperwork to disguise their looting of art and valuable possessions has been uncovered by an amateur sleuth researching her own family mystery. French writer Pauline Baer de Perignon’s investigation has revealed the fate of a missing collection of art that included work by Monet, Renoir and Degas and also exposed the reluctance of Europe’s leading museums to accept evidence of the deceit. Baer was prompted to look into the past when she bumped into an English cousin who told her he believed the family had been “robbed”. “The whole...