Second Phase - The Domitianic Fort (after the Emperor, Domitian)
About 86 AD the Agricolan fort was extended to 14.5 acres and its defences strengthened. The two ditches were infilled and replaced by a single huge ditch, 20' across and 12' deep. The earth rampart, again on a cobble and rubble base, was now 43 ' wide and 28' high (including the palisade on top). The buildings, though still wooden, had stone foundations - to last longer. As with phase I, there is little evidence for the arrangement of buildings and streets within the fort.