It is also probably the most misunderstood archaeological monument in Britain. In a fascinating journey along the 73 miles of the Roman wall World Heritage Site Eric Robson unravels some of the mysteries of two and a half thousand years of history. The story is not just in the stones that build the forts and mile castles along the way but in the people. From Iron Age farmers and diplomats to Roman shopkeepers and civil servants: from Imperial soldiers bred in North Briton to dark ages protection racketeers and border reivers. The frontier that the Emperor Hadrian created is with us still.