Request #142

Looking for a book I read in the 1980s. It was probably YA, though it had some very adult moments. It was about 3 girls. I know one was from Scotland because I distinctly remember the description of the rocks and moss and how sad she was to leave it all. I believe one was from England and the other was from America (maybe). In the beginning, there was a chapter or chapters written from each girl’s perspective. They all were going away to boarding school in Switzerland (I think). None of them understood why they were going, or how it was being paid for. It turned out they were all sisters with a common unknown father who had paid for them to go.