It is about a girl in Norway in about 1960 who is trying to break away from the church, and from her father (who is the priest). Not as one-sided as that may make it seem (the father is confused and upset as well), and not nearly as much of a downer either. Looks beautiful as well.
Talking of Susan Stranks, here is a streamed/dual download of Blue Lagoon.
I don't know what the quality is like; the other versions I've got are pretty much unwatchable: for most people anyway; I think I'd manage it ok, but it would be good to have a decent version, where you can tell the gender of a character from how they look and not just their voice.
I absolutely love the old b/w movies. Watch them every day when I can. I've met quite a few well know actors over the years, including the man above Dirk Bogarde. Another actor who was in the James Bond films had already warned me about Bogarde so I was very apprehensive about him. He had an annoying touchee feelie with men. Charming at first but a man to keep your distance from.