Born to eccentric, incompatible and hugely spoilt parents, Osbert, Edith and Sacheverell Sitwell were uncomfortable, remote children who seemed to live in a world of their own. In a multitude of ways, this state of affairs endured for the rest of their lives. When D H Lawrence met them in the late 1920s he was bemused by their self- absorption, "as if they were marooned on a desert island and nobody in the world but their lost selves". The socially and artistically voracious triumvirate were by now renowned as writer-patrons; their reading through megaphones of Edith's Facade to William Walton's music passed into legend.
This self-dramatising was a gift to other …