way to seventeen when the engineer very solemnly informed her that he had arranged a valid South African passport for her, even though she was black. The fact was, without one she could no longer have access to all the corridors that the indolent engineer felt she ought to have access to. The rules had been issued by the South African intelligence agency, and Engineer Westhuizen knew how to pick his battles.
He kept the passport in his desk drawer and, thanks to his incessant need to be domineering, he made lots of noise about how he was forced to keep it locked up.
‘That’s so you won’t get it into your head to run away, whatsyourname. Without a passport you can’t leave the country, and we can always find you, sooner or later,’ said the engineer, giving an ugly grin.
Nombeko replied that it said in the passport whathernamewas, in case the engineer was curious, and she added that he had long since given her the responsibility for his key cabinet. Which included the key to his desk drawer.
‘And I haven’t run away because of it,’ said Nombeko, thinking that it was more the guards, the dogs, the alarm, the minefields and the twelve thousand volts in the fence that kept her there.
The engineer glared at his cleaning woman. She was being impudent again. It was enough to make a person crazy. Especially since she was always right.
That damned creature.
Two hundred and fifty people were working, at various levels, on the most secret of all secret projects. Nombeko could state with certainty early on that the man at the very top lacked talent in every area except feathering his own nest. And he was lucky (up until the day he wasn’t any more).
During one phase of the project development, one of the most difficult problems that needed to be solved was the constant leakage in experiments with uranium hexafluoride. The engineer had a blackboard on the wall of his office upon which he drew lines and made arrows, fumbling his way through formulas and other things to make it appear as if he were thinking. The engineer sat in his easy chair mumbling ‘hydrogen-bearing gas’, ‘uranium hexafluoride’ and ‘leakage’ interspersed with curses in both English and Afrikaans. Perhaps Nombeko should have let him mumble away: she was there to clean. But at last she said, ‘Now, I don’t know much about what a “hydrogen-bearing gas” is, and I’ve hardly even heard of uranium hexafluoride. But I can see from the slightly hard-to-interpret attempts on the wall that you are having an autocatalytic problem.’
The engineer said nothing, but he looked past whatshername at the door into the hallway in order to make sure that no one was standing there and listening, since he was about to be befuddled by this strange being for the umpteenth time in a row.
‘Should I take your silence to mean that I have permission to continue? After all, you usually wish me to answer when I’m spoken to and only then.’
‘Yes, get on with it then!’ said the engineer.
Nombeko gave a friendly smile and said that as far as she was concerned, it didn’t really matter what the different variables were called, it was still possible to do mathematics with them.
‘We’ll call hydrogen-bearing gas A , and uranium hexafluoride can be B ,’ Nombeko said.
And she walked over to the blackboard on the wall, erased the engineer’s nonsense, and wrote the rate equation for an autocatalytic reaction of the first order.
When the engineer just stared blankly at the blackboard, she explained her reasoning by drawing a sigmoid curve.
When she had done that, she realized that Engineer van der Westhuizen understood no more of what she had written than any latrine emptier would have in the same situation. Or, for that matter, an assistant from the City of Johannesburg’s department of sanitation.
‘Please, Engineer,’ she said. ‘Try to understand. I have floors to scrub. The gas and the fluoride don’t get along and their unhappiness
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