I met a fellow collector on Facebook at The Early Stoneware Study Group Site.
He was generous to share some of these shards with me. They were dug from the Warnack Stoneware waster dump in Alton Illinois. The field trial was cut from an unfired bowl, late 1840's to mid 1850's. It was in two pieces when found so it was a used piece. Jug plug 1850's and the molded bowl noodle pads 1860's.
littlebrownjugs.com is a site dedicated to the History of Bennington and the Norton Pottery.
But the stoneware manufacturing process and the tools in this process have always captivated me.
Hence the display of these shards from Alton Illinois.