‘Not much, perhaps. But it was evidence. It might have planted a few doubts here and there, supposing that I’d dared to show it to anybody. I don’t imagine that we can alter anything in our own lifetime. But one can imagine little knots of resistance springing up here and there – small groups of people banding themselves together, and gradually growing, and even leaving a few records behind, so that the next generation can carry on where we leave off.’