Dissapointing piece of information,that I have just dug up about the biggest Walker site, which was at the holmes.
This was a large estate,with a farm, houses,3 blast furnaces, and cannon test firing ranges.
The picture below, shows part, of one of the blast furnaces,used for cannon casting,that some idiot demolished back in 2002.
It would have made a great museum.

Drawing of the site from about 1770,showing where the blast furnace was.The building in the photograph can be seen to the left of the arrow,under the B of blast furnace.
