Cool stuff.
Did you happen to find what's left of the Davis Mill? It's on the right bank of Hunt's River, once it goes under the road. It's not much but it's nice to photograph.
From you pictures it looks like you were pretty close.
I went there this weekend. The old mill site is rather interesting. You can see how they diverted a part of the Hunts River to power their mill. Additionally there are forge smeltings scattered across the ground. Multiple foundations as well. Reading up on it, it seems this man-made stream leads to School street.
Here are some of the photos we took of what's left of the original mill. http://exploreourhistory.webs.com/davisville.htm