Polygonal wall of irregularly worked gray and orange-brown tufo blocks. Wall is in baulk that represents W excavation limit of Area A in 2010; only E side of part of the wall is visible - all other limits including bottom, width, etc are not visible at this time. Visible part of wall photographed and drawn in 2010 and visible part of wall mapped with reflectorless technique, but not mapped in the GIS database in 2010.