Virginia Woolf’s collections of essays, The Common Reader, The Death of the Moth and so on, reward those looking for interesting interstices within English literature. In the latter, in an essay entitled ‘Reflections at Sheffield Place’, I first met John Holroyd, 1st Lord Sheffield, and his daughter Maria Josepha, and found out about their friendship with Edward Gibbon. I then discovered that two volumes of letters by Maria Josepha and her family had appeared in the 1890s and that two more came out in the 1930s, edited by Nancy Mitford. Intrigued, I tracked them down and entered another world.