A pioneer in cybernetics, neurology, and the development of the computer, Warren S. McCulloch maintained five years of appointment books in his late-career (1963, 1965, 1966-68). Although McCulloch records only spare notes, these volumes document meetings, travels, and lectures that ought to interest scholars researching McCulloch and the history of cybernetics more broadly. McCulloch makes regular references to American Society for Cybernetics (often simply as "ASC") and participates in a "Symposium on higher nervous activity Madrid (IV World Congress of psychiatry)" (9/5-9/11/1966). Notably, he includes some ephemera in his earliest volume, scraps which can offer glimpses into his research and professional activities. For example, he encloses a slip of note concerning a talk entitled "The Evolution of Culture as Revealed by Scale Analysis" dated 11/25/1963.