This rectangular Roman camp was probably built in the first century AD. It measures 150m east to west by 130m north to south. Around the camp is a bank of earth 3.5m wide and 1.5m high with an outer ditch 3.5m wide. There are three entrances, each protected by an external curving earth bank, or clavicula. The camp was probably used by groups of Roman soldiers advancing north towards Scotland and by smaller groups carrying out routine maintenance. This is a Scheduled Monument protected by law.