Oh it's driving me mad!
A classic novel, also made into a beautiful tv series with a modern soundtrack a few years back.
I think later than the Brontes?
It tells the story of an impoverished young woman, at a good school, managed to convince rich friend to take her home with her. It's all about her aspiration. It takes in travel abroad and a war. And I think ends with her back in the UK getting her just desserts.
Help much appreciated!!