Like a surgeon yielding a scalpel, Ussishkin’s team made a deep incision into the western slope of Lachish. The team cut seven pairs of excavation squares, running from the city wall to a corner of a palace-fort at the summit of the mound. Each square measures 5.5-by-5.5 yards (5 meters by 5 meters); the squares are separated by balks, unexcavated walls that preserve a record of the stratigraphy.