Abstract The Mark Harris letters to Martha Harris is a collection of letters, printed emails, faxes, and photographs that were shared over a period of fifty years between American author Mark Harris (1922-2007) and his sister Martha Harris (1933-2020). The letters contain updates on family news, advice to Martha on education, publishing and writing, reflections on Mark's career as writer and professor, and his shared diary entries through which the two siblings attempted to reconstruct childhood...