The research that underpins this study began in 1989, and it comes from libraries and private collections from five countries on three continents, Australia, North America, and Europe, and the libraries used, cited in the List of Abbreviations and in the various entries, number fifty-two, the private collections seven. The major accomplishment of the book, however, lies not in its many sources but in the way its parts are fitted together to form a picture of a major writer's work.