chunk: Clarence and Emmeline Mumford are a middle-class couple, living in suburban Sutton on the outskirts of London with their two-year-old son. Reading the newspaper, they become aware of a young woman seeking a place as a "paying guest", or lodger. To supplement their income they respond to the advertisement and meet the prospective tenant, named Louise Derrick, who is in need of a place to live due to disagreements with her immediate family. Louise, who is poorly educated and bad-tempered, is being romantically pursued by two men: Mr Bowling, who is courting Louise's stepsister Cecily, and Tom Cobb.