The Germans could have suspected even more surreptitious activities, since Portugal, like Switzerland, was a crossroads for internationals and spies from both sides. British historian James Oglethorpe investigated Howard's connection to the secret services. Ronald Howard's book explores the written German orders to the Ju 88 squadron in great detail, as well as British communiqués that purportedly verify intelligence reports indicating a deliberate attack on Howard. These accounts indicate that the Germans were aware of Churchill's real whereabouts at the time and were not so naive as to believe he would be travelling alone on board an unescorted, unarmed civilian aircraft, which Churchill also acknowledged as improbable. Ronald Howard was convinced the order to shoot down Howard's airliner came directly from Joseph Goebbels, Minister of Public Enlightenment and Propaganda in Nazi Germany, who had been ridiculed in one of Leslie Howard's films, and believed Howard to be the most dangerous British propagandist.