“No writing is wasted. Did you know that sourdough from San Francisco is leavened partly by a bacteria called lactobacillus sanfrancisensis? It is native to the soil there, and does not do well elsewhere. But any kitchen can become an ecosystem. If you bake a lot, your kitchen will become a happy home to wild yeasts, and all your bread will taste better. Even a failed loaf is not wasted. Likewise, cheese makers wash the dairy floor with whey. Tomato gardeners compost with rotten tomatoes. No writing is wasted: the words you can’t put in your book can wash the floor, live in the soil, lurk around in the air. They will make the next words better.”

I have noticed that when all the lights are on, people tend to talk about what they are doing – their outer lives. Sitting round in candlelight or firelight, people start to talk about how they are feeling – their inner lives. They speak subjectively, they argue less, there are longer pauses. To sit alone without any electric light is curiously creative. I have my best ideas at dawn or at nightfall, but not if I switch on the lights – then I start thinking about projects, deadlines, demands, and the shadows and shapes of the house become objects, not suggestions, things that need to done, not a background to thought.