In about 1850 Isaac Sanborn started an earthenware pottery in Twin Grove, a small village in the Jefferson Township of Green County about ten miles southeast of the city of Monroe...
Article about the history of the pottery: Twin Grove Pottery(will open in a new tab in your browser)
Related article: Twin Grove Pottery Site Excavation A large number of sherds were recovered from the site. This article includes photos of them and findings and conclusions about the pottery produced there.