1700's 1850 Feather edge or creamware another name. cobalt with lead glaze.
always been a good indicator of an old house site. definitely worth a closer look at area and various other pottery means not just a single discard. always a plus find for us southern hunters.
open wells a hazard in the woods around old housesites, half filled in sometimes, in the south. but they also filled old outhouses up with throw away... just be carefull. and look some more!