Dolly = Malory Towers! From what I understand, Malory Towers is actually more popular in England than St Clare's! Not surprisingly perhaps, as the latter only has six books.

I've no idea whether Dolly was written by German authors, too. I remember that Dolly became "Hausmutter" (matron, probably?) in the end - perhaps that wasn't in the original? Maybe some Brit will know. Or Wikipedia.

With Heino Ferch, apparently. I must admit, I am morbidly curious.