I went last night to the NPG to hear Joanna Trollope talk about her two essays she has written in the NPG book of essays in which famous writers have given a life to an unidentified portrait in the collection.
There was then a Q&A and I asked her about whether she wrote with a fountain pen or used a laptop and she replied neither. She could write with any old biro but always, always on lined paper with a margin and only on the right hand page.