Diaries, Journals and Notebooks Leonardo da Vinci’s notebooks have probably brought him more renown with academics than the fifteen paintings he made in his life time. Filled with investigations of anatomy, botany, geology, mathematics and inventions for bridges, flying machines, war machines, submarines, musical instruments, they continue to be relevant today. A small hand bound notebook was always tied to his belt at all times, ready to jot down ideas, observations and a to-do list. The pocket notebook was also a fixture of many writers, scientists, soldiers and statesmen, including Darwin, Hemmingway, Beethoven and George Lucas. It came to be seen as a masculine, accessory. Maugham kept a writer’s notebook in which he wrote sketches of people he met who might make it into his next novel. Frieda Kahlo, Paul Klee and Picasso’s notebooks, like that of most artists were not only part of the creative process but were also a “friend” in difficult personal times. Picasso said ...