THE ... "old painting"

It's interesting and perhaps useful to compare our findings with an old painting. I've zoomed and cropped the image for our observation purposes. How much has the artist used poetic licence and to what extent does it give us more clues:

1. Is this the inlet point to the old waterwheel and where the old sluice is?
2. look at the building on the side, or is it the side? If it is the old mill, grain would have to be delivered by horse and cart and flour would have to be taken away.
3. Is this the present bank surrounding (containing) the old structure which is beneath pond level, or some definition?
4. There is no platform, governor house, nor extension/annex/door (i.e. todays tea room) to the present watermill;
5. Therefore, with little definition of the waterwheel on the side of the building, is it actually located there at this point in history?
6. Is the weir built at this time? Are the watercourses defined as they are today? Which side of the Mill(s) is the main flow of the river Dour actually running?
7. This is a square building and is similar to the drying kiln which is now house-converted. The other Mill buildings at the weir-side (also now house-converted) on this painting do not appear to have been built yet. Does this enable us to chase a more accurate date for this site-plan and layout?

Answers on a postcard please!!