The first indication of domesticated horses in England comes from archaeological investigations showing that the ancient Britons were using wheeled horse-drawn transport extensively in southwest England as early as 400 BC. Recent research has indicated that there was significant Roman involvement in mining on Exmoor. Metals including iron, tin, and copper were transported to Hengistbury Head in neighbouring Dorset for export, and Roman carvings, showing British and Roman chariots pulled by ponies phenotypically similar to the Exmoor, have been found in Somerset.