96pp., 100 illus., P.B. 2018. Years before the Romans, Northumberland was a landscape of hilltop forts, many of which can be traced today. Hadrian’s legions built the 73-mile northern frontier of the Roman Empire across the county. Through the Dark Ages and into Medieval times, the kingdom of Northumbria was governed from massive castles, and the constant threat of the Border Reivers is evidenced in the masonry of fortified farmhouses, pele towers and churches.