Junior Commander Mary Churchill Mr. Churchill and his daughter Mary flew to Brussels yesterday on a private visit to the Belgian Regent, Prince Charles. Newspapers are speculating whether the visit has a romantic explanation. One diarist leads his column with a report that Brussels rumor-lovers already are whispering of romance, linking Mary Churchill's name with that of the regent. Belgian newspapers, he adds, have been asked not to print any references to the visit. September 30, 1943.