"Well done. You found it." Edmund de Waal seems genuinely surprised that I've managed to locate his studio, in south-east London - left at the charity shop, past the Co-op, the kebab house and launderette and right, down a dusty path, past cars being fixed with much drilling and banging.
It is a world away from the palatial homes in 19th-century Paris and turn-of-the century Vienna of the Jewish Ephrussi dynasty, the subject of his family memoir. Houses full of beautiful art collections, libraries full of precious books.