Mystery surround the presence in London of Herr Johann Hans Winkler , secretary to Julius Streicher , the Governor of Franconia , and one of the leaders of the anti - Semitic movement in Germany . Although Streicher has repeatedly said that it was his intention to spread the anti - Semitic movement throughout the world , no reason is given for the appearance of Herr Winkler in London . Photo shows: Herr Winkler (left) entering the Law Courts in London with George Andrew MacMahon , the man who was imprisoned in July 1937 after demonstrating with a revolver when King Edward VIII rode along Constitution Hill . 17 November 1938