Two trenches excavated within the grounds of Holwood House, on behalf of the Crest Nicholson Group, located the real position of the southern edge of the Iron A g e hillfort. The outer rampart, outer ditch and counterscarp bank were revealed, and as expected, found to be situated outside the current Scheduled Ancient Monument perimeter. Adding to earlier evaluation work, the true line of the southern defences were also found to coincide with existing earthworks which had previously been presumed to be related to garden landscaping and recent industrial development. Combined, the excavated ditch and bank segments and re-discovered earthworks represent a substantial reconstruction of the southern defences that complement Milne's 1790 survey.