14:00 Pandemonium, a group from Lakers Secondary School performing with their Steel Pans in one of the caverns at Clearwell Caves. 14:20 Harpist Bob Swannock performing in Clearwell Caves.
Later, pits such as Clearwell Caves, went deeper underground as demand rose for the newer, lighter but stronger metal. People tried to keep the process of making iron secret to preserve their power.