Half an hour before, Gala Brand had stubbed out her breakfast cigarette, swallowed the remains of her coffee, left her bedroom and walked across to the site, looking very much the private secretary in a spotless white shirt and dark blue pleated skirt. Punctually at eight-thirty she was in her office. There was a sheaf of Air Ministry teleprints on her desk and her first action was to transfer a digest of their contents on to a weather map and walk through the communicating door into Drax’s office and pin the map to the board that hung in the angle of the wall beside the blank glass wall. Then she pressed the switch that illuminated the wall map, made some calculations based on the columns of figures revealed by the light, and entered the results on the diagram she had pinned to the board

