Until three weeks ago the Museum of Central Bohemia was one of the most interesting and dynamic smaller museums in the Czech Republic. Housed in the little town of Roztoky, just outside Prague, it included unique archaeological collections, several permanent exhibitions and a huge number of historic artifacts from Central Bohemia. Then on the 13th August the waters of the River Vltava swept through the museum, floods that hadn't been seen here for five hundred years. With the waters now subsided, David Vaughan visited the museum to