Jacob Rothschild

My parents divorced. There was the usual awkward business of going between them, but I was mostly with my mother. She remarried to a Greek painter Nico Ghika, so we were always around artists and intellectuals.

My mother was a Bloomsbury figure: a great friend of TS Eliot, Duncan Grant, Vanessa Bell. My grandmother, Mary Hutchinson, gave her life to works of art, being an admirer of Matisse and Giaometti, whom I collected as a young man because of her.

It's a question of spreading the available energy, aerobic and anaerobic, evenly over four minutes. If you run one part too fast, you pay a price. If you run another part more slowly your overall time is slower.

Topsoil is a place of digestion. It sucks and chews things into smaller pieces. When it's hungry, it turns grey and stony; when it's thirsty, it opens thousands of cracked lips. Subsoil is more skeletal: it doesn't digest.