Text 03: The street, a seedy but busy thoroughfare of garment shops and small business premises running through the huge ten-mile-thick B.I.R. Industrial Cube, ended abruptly in a tangle of ripped girders and concrete. A steel rail had been erected along the edge and Franz looked down over it into the cavity, three miles long, a mile wide and twelve hundred feet deep, which thousands of engineers and demolition workers were tearing out of the matrix of the City. Eight hundred feet below him unending lines of trucks and railcars carried away the rubble and debris, and clouds of dust swirled up into the arc-lights blazing down from the roof. As he watched, a chain of explosions ripped along the wall on his left and the whole face slipped and fell slowly towards the floor, revealing a perfect cross-section through fifteen levels of the City. Franz had seen big developments before, and his own parents had died in the historic QUA County cave-in ten years earlier, when three master-pillars had sheared and two hundred levels of the City had abruptly sunk ten thousand feet, squashing half a million people like flies in a concertina, but the enormous gulf of emptiness still stunned his imagination.