What is this book called?

I read a book (romance novel?) about thirteen years ago, and now I'm trying to find it again. It was about a girl who goes to live on the English moors. She meets a brooding stranger who walks his two mastiff dogs, Romulus and Remus, on the moors. They fall in love, blah, blah, blah, you can guess the rest. Normally, I don't have a problem locating things like this on the web, but I can't remember anything distinctive besides the dogs' names. Anybody got any ideas what this book might be or who wrote it? Thanks in advance!