The Girl Who Saved the King of Sweden. Jonas Jonasson

decided to take a break from her thoughts of escape. Anyway, it was possible that her only chance would be to make herself invisible and equip herself with wings. Wings alone wouldn’t suffice: she would be shot down by the eight guards in the four towers.

      She was just over fifteen when she was locked up within the double fences and the minefield, and she was well on her 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 runs away with itself.’

      ‘What’s the solution?’ said the engineer.

      ‘I don’t know,’ said Nombeko. ‘I haven’t had time to think about it. Like I said, I’m the cleaning woman here.’

      In that instant, one of Engineer van der Westhuizen’s many qualified colleagues came through the door. He had been sent by the research director to share some good news: the team had discovered that the problem was autocatalytic in nature; this resulted in chemical impurities in the filter of the processing machine, and they would soon be able to present a solution.

      There was no reason for the colleague to say any of this, because just behind the Kaffir with the mop he saw what the engineer had written on his blackboard.

      ‘Oh, I see that you have already figured out what I came to tell you, boss. I won’t disturb you, then,’ said the colleague, and he turned round in the doorway.

      Engineer van der Westhuizen sat behind his desk in silence and poured another tumbler full of Klipdrift.

      Nombeko said that this certainly was lucky, wasn’t it? She would leave him alone in just a minute, but first she had a few questions. The first was whether the engineer thought it would be appropriate for her to deliver a mathematical explanation for how the team could increase the capacity from twelve thousand SWUs per year to twenty thousand, with a tail assay of 0.46 per cent.

      The engineer did.

      The other question was whether the engineer might be so kind as to order a new scrubbing brush for the office, since his dog had chewed the old one to pieces.

      The engineer replied that he wasn’t making any promises, but he would see what he could do.

      Nombeko thought she might as well appreciate the bright spots in her existence, as long as she was locked up with no possibility for escape. It would, for example, be exciting to see how long that sham of an engineer Westhuizen would last.

      And all told, she did have it pretty good. She read her books, preferably while no one was looking; she mopped a few hallways and emptied a few ashtrays; and she read the research team’s analyses and explained them to the engineer as plainly as she could.

      She spent her free time with the other help. They belonged to a minority that the regime of apartheid found more difficult to categorize; according to the rules they were ‘miscellaneous Asians’. More precisely, they were Chinese.

      Chinese people as a race had ended up in South Africa almost a hundred years earlier, at a time when the country needed cheap labour (that also didn’t complain too bloody much) in the gold mines outside Johannesburg. That was history now, but Chinese colonies remained, and the language flourished.

      The three Chinese girls (little sister, middle sister and big sister) were locked in with Nombeko at night. At first they were standoffish, but since mah-jongg is so much better with four than with three, it was worth a try, especially when the girl from Soweto didn’t seem to be as stupid as they had reason to believe, given that she wasn’t yellow.

      Nombeko was happy to play, and she had soon learned almost everything about pong, kong and chow, as well as all possible winds in every imaginable direction. She had the advantage of being able to memorize all 144 of the tiles, so she won three out of four hands and let one of the girls win the fourth.

      The Chinese girls and Nombeko also spent some time each week with the latter telling them all that had happened in the world since the last time, according to what she had been able to pick up here and there in the hallways and through the walls. On the one hand, it was not a comprehensive news report; on the other, the audience’s standards weren’t all that high. For example, when Nombeko reported that China had just decided that Aristotle and Shakespeare