Arlington H. Mallery displays the 62-pound bar of cast iron he discovered in the Arledge Mound when excavating remains of a pit iron furnace near Chillicothe, Ohio in 1948. The amateur archaeologist was surprised to find the cast iron bar stuck in an air duct of one of two furnace pits found in the mound, since he only expected to find wrought iron associated with a bloomery smelter. Photo by William Conner.