Just a week after the Kristallnacht terror in 1938, young Luzie Hatch, a German Jew, fled Berlin to resettle in New York. Her rescuer was an American-born cousin and industrialist, Arnold Hatch. Arnold spoke no German, so Luzie quickly became translator, intermediary, and advocate for family left behind. Soon an unending stream of desperate requests from German relatives made their way to Arnold’s desk.   Luzie Hatch had faithfully preserved her letters both to and from far-flung...