When she was 25, the family moved to England where she decided to devote all her time to writing, using the name P.L. Travers. In 1931, she and her good friend Madge Burnand moved out of their rented London flat into a thatched cottage in Sussex. It was here, two years later, she began to write the Mary Poppins books.
I’m betting most people, however, think of Mary Poppins as a movie from Walt Disney and not as a series of books by one P.L. Travers. It appears we will learn this Christmas how that transition came about.