‘There are just not enough horses’ heads looking out of the boxes,’ said William Jarvis as he ended a 140-year-old family dynasty training in Newmarket. We are losing too many like him. But racing has surmounted previous downturns as a remarkable new book reminds us. George Stubbs is credited as the first great equestrian artist to present galloping horses correctly, with all four feet off the ground rather than splayed out like rocking horses, but James Seymour – to my eye an equally talented artist – had at least experimented with the idea.