For a few days now I’ve not been able to stop thinking of horses. Their origins mysterious, like the origin of everything we see around us. Their role in human history and culture, large and long. When humans arrived in most continents, the number of equine species had probably already dwindled to more or less what it is now: two or three. Historically, only two were domesticated, horses and donkeys. Although zebras have been trained (Lord Rothschild once drove to Buckingham Palace on a zebra-drawn carriage) they have not been successfully raised in domesticity.

Two sculptures of horses really stick in my mind. One is the pair of life-sized blue horses, polyester resin images made by the French artist Assan Smati, the other is the group of four harnessed to a chariot, made of fired clay in China probably 2200 years ago for the tomb of the Qin emperor Shi Huang.