North of Great Cistern. Deep mass of ancient fill beneath late walls, north of northeast corner of cistern showing late walls and gouging at south, / ... / under wall of cistern. A is north wall of cistern, ... AMS Horizontal (normal) ... North of Great Cistern. Deep mass of ancient fill beneath late walls, north of northeast corner of cistern showing late walls and gouging at south, / ... / under wall of cistern. A is north wall of cistern, b is late wall, x,x' are late wells. P is north of passage under cistern.