The Saxon advance from the east seems to have been halted by battles between the British and Saxons, for example; at the siege of Badon Mons Badonicus (which may have been in the Bath region e.g. at Solsbury Hill), or Bathampton Down. During the 5th, 6th and 7th centuries, Somerset was probably partly in the Kingdom of Dumnonia, partly in the land of the Durotriges and partly in that of the Dobunni. The boundaries between these is largely unknown, but may have been similar to those in the Iron Age. Various "tyrants" seem to have controlled territories from reoccupied hill forts. There is evidence of an elite at hill forts such as Cadbury Castle and Cadbury Camp; for example, there is imported pottery. Cemeteries are an important source of evidence for the period and large ones have been found in Somerset, such as that at Cannington, which was used from the Roman to the Saxon period. The towns of Somerset seem to have been little used during that period but there continued to be farming on the villa sites and at the Romano-British villages.