Who was the mysterious Master of Paspardo? [audio 15min]

Over a series of five programmes, archaeologist Dr George Nash of Bristol University visits five rock art sites in England, Wales, Ireland, Portugal and Italy, to attempt to unravel the real, hidden meaning of rock art. Who creates rock art, and why? Can our present day graffiti artists provide some clues? In Programme Four, "The Master of Paspardo", Italian archaeologists Professor Angelo Fossati and Dr Andrea Arca show Nash round the biggest rock art area in Europe. There are an astonishing 300,000 prehistoric carvings within commuting distance of Milan. The images include dwellings that closely resemble English medieval houses and the world famous Bedolina Map, being studied by Englishman Craig Alexander. But what does it record? Is it a real or mental map, marking out a cultural territory as modern graffiti does today? And who was the mysterious Master of Paspardo, who seems to have had a hand in so many of the drawings?