Hi Tricy,
Sorry, I forgot about the watermill (I keep thinking of windmills).
Will try another search now:
[
www.imdb.com]
[
www.imdb.com]
I can tell that the imdb is not very thorough as there are at least two more movies, a thriller with Joanne Woodward called "Signpost to Murder" and a drama with Rock Hudson called "All that Heaven allows" where you can see watermills either inside the house or next to the house.
Cheers,
C.