Disturbed Dropfieldian trench, looking west: W1, back of retaining wall between M (M) and W (W) terraces; W2, back of Late Roman wall to west of terrace ... AMS Horizontal (normal) ... Disturbed Dropfieldian trench, looking west: W1, back of retaining wall between M (M) and W (W) terraces; W2, back of Late Roman wall to west of terrace.