By the end of the 1920s domestic service remained the largest female occupation in Britain. We view it today as an undesirable job, owing to the class divide it has come to represent, and this is reflected in the portrayals of mistresses and servants in books and on the screen in such dramas as Upstairs Downstairs and Downton Abbey. But what do we really know about how girls felt when taking up these positions in other people's houses, or how they...