Origin of your Windmill line

Where did your Windmill line start and how far back have you got?

So far I have only got back as far as the early 1700s in Wing, Buckinghamshire. There were Windmills in the same village going back nearly a further 100 years and Windmills in many surrounding villages who I hope to either tie in to this line or find different lines for.

I've heard rumours that one of the West Midlands lines started in Buckinghamshire too - do you have any information on this?

Any info you want to share?