In his piece about the internal exile of Jorge Mario Bergoglio, after his time as leader of the Jesuits in Argentina (“Deeply divided Society”, 29 November), Austen Ivereigh criticises a biography of Pope Francis which makes an “attempt to reconcile the ‘conservative’ Jesuit of the 1980s with the ‘progressive’ bishop of the 1990s by imagining a kind of conversion experience in Córdoba”.My biography Pope Francis: untying the knots does indeed have such a conversion experience at the heart of its narrative. But it is not “imagined”. Rather, it is based on the testimony of a number of individuals named in the book – including fellow Jesuits, residents, novices, students and others who knew Bergoglio at the time. And of