Test of red earthenware, square model with round bottom, on three legs, bandoor, test fire test heating floor finding ceramic earthenware glaze lead glaze, bottom 13.0 hand turned hand shaped glazed baked Fire test of red earthenware entirely with lead glaze covered quadrilateral with pinched ear on one corner three legs rotations archeology Valckensteyn Poortugaal Albrandswaard indigenous pottery kitchen fire footstep hand warmer foot warmer Soil discovery: canal at kitchen castle Valckensteyn at Poortugaal now Albrandswaard 1962.