What is the history of Mr. and Mrs. Lone meeting?

Terry's parents had taken their daughter with them to London to take her away from the feminist movements of Smith college. Terry had gone out to Trafalgar square on her own and met a young man at a protest who stayed with her and then taken her back to the hotel. He had promised to marry her and they had corresponded through letters for two years. She had gone to art school and he had decided to become a banker.