The discovery some weeks earlier that Sublevel Three housed an independent Department of Supply computer had, in spite of the chemical shields around his mind, numbed Mathieu with dread. It had been installed decades ago at the instigation of some forgotten Metagovernment official, back in the days when Orbitsville was more actively concerned with the affairs of Earth, and since then had — unknown to Mathieu — been monitoring the distribution of certain categories of imports.

The computer's specification had apparently been drawn up by a bureaucratic supersnoop with a tendency to paranoia. It had an internal power supply which was good for at least a century, and it obtained its entire data input by direct sensing of product identity tags within a radius of fifty kilometres. The single feature of the system which had operated in Mathieu's favour was that the computer did not interact with Madison City's general information network. It sat in the building's deserted lower levels, like a spider interpreting every vibration of its web, acquiring and storing detailed knowledge of the movement of Metagov supplies throughout the region. The information was jealously guarded, locked inside an armoured data bank — but it would be yielded on receipt of the correct command.

And even a cursory glance at the print-out would show that Mathieu had privately disposed of public property worth some half-a-million monits. The consequences of such a revelation were something that Mathieu could not bear to think about. He had resolved to destroy the evidence, regardless of the additional risk.

On reaching Sublevel Three he turned right and went through a ballroom-sized area which had once been used as a computer centre and now was a maze of movable partitions and discarded crates.