"Pamela Travers appears and disappears as magically as the nanny she created. The New Yorker is the latest to discover the real Travers, the Australian who invented Mary Poppins 70 years ago. Travers told me in 1995, a year before her death, that she would talk of her work, but never of herself. In her lifetime, a biography was impossible, partly because she left so many false trails. Luckily, she also left a paper trail of truth at her London home and in a Sydney library."