The Anglo-Saxons eventually expanded across Norfolk. By 850 AD the majority of the county's current pre-Danish placenames had been created, although only two names – "Deorham" (modern West Dereham) and "Cnobheresburgh" (the site of an unidentified monastery on the east coast) – exist in early Anglo-Saxon documents. Evidence of the importance of the emerging trade settlements of Thetford and Norwich is still being discovered. Numerous other sites in the county have revealed evidence of Anglo-Saxon settlement, for instance at North Elmham (where there is evidence of timber buildings and roadways), or at Bawsey (with finds of pottery, coins and metalwork). Six late Anglo-Saxon silver brooches were discovered at Pentney in 1978, that may have belonged to a local maker or dealer.