George Monkhouse in his book "Motor Racing with Mercedes-Benz 1934-39, describes a visit to Franz-Josef Popp's vacation home in Bavaria shortly before the war. Popp was BMW's chief at that time. Dick Seaman, another Mercedes driver was married to Popp's daughter and had been killed a year earlier. Monkhouse worked for Kodak and would shoot photographs of the team, and the racing cars. Monkhouse was invited to Popp's for dinner as well as
Ernst Udet. This was during the summer of 1939. Popp sent the family and servants out of the house and Udet swept the house for bugs and other listening devices. After this then he shared his insights and views about the Nazi leadership and what he REALLY thought of them. He thought Hitler and the other leaders were going to ruin the country. This is what Monkhouse recorded Udet saying during that dinner in 1939. He also told him how to leave the country to avoid trouble.