Excavating around Salisbury PlainLast month I began a tour around the final county of the UK that I had yet to visit in these pages: Wiltshire. I began in the north and headed south as far as the Vale of Pewsey. This month I will continue into what is popularly seen as the most fertile of all archaeological hunting grounds, the county’s central belt around Salisbury Plain. I will devote future columns specifically to Stonehenge and Avebury, so we will pass through these on this occasion i