I think the one factor which distinguishes the professional writer from the non-professional lies in the concept of deadlines. There are many people who write for their own pleasure, because they enjoy it. I’ve now given up teaching in the university, but for a long time I had an adult literature class which developed a spin-off for those who wanted to write. Every few weeks they would bring along their work and read it out. Some of it was very good indeed. But – apart from one person – they had no interest in a professional writing career. They wrote for themselves or for their families. Several wrote stories based on their childhood, for the benefit of their children or grandchildren. That is how Laura Ingalls Wilder started out, we should remember. So did many other distinguished children’s authors.