The injury was not over in a week and I want to put the real course of it in, because the version I had in my head on the Saturday she was discharged was approximately: a bad bump, headaches for a fortnight, back to normal.

That is not what a concussion is in a significant minority of people and nobody tells you the odds in the discharge paperwork.

She had headaches daily for about nine weeks and then intermittently until the February.

She could not tolerate the fluorescent lights at the clinic for about five weeks and wore a cap indoors, which she hated.

She could not read for more than about twenty minutes without the words moving, which is the one that frightened her most and which she did not tell me about for eleven days.

She slept eleven and twelve hours and woke up tired.