LONDON — “Don’t worry,” furrier Abraham Reiman told his daughters, Madeleine, 11, and Arlette, aged nine. “Don’t worry, this is the land of freedom, of Voltaire and Rousseau.” It was July 1942 and one of the blackest periods in the lives of French Jews. Arlette Reiman, her sister and her mother Malka, were among more than…