“They get quieter over the years. They still whisper to you sometimes, but the world gets louder. You can see it and hear it again. There's a gap in it, where they used to be. But you get used to the gap; so used to it that you can hardly see it. And then some days, out of nowhere, you're making the tea or banging out the washing or sitting on the bus and it's there again: that aching, empty space that will never be filled.”