Comprises diaries and papers. The diaries were kept on overseas trips between 1946-1984. Countries visited included the United States, United Kingdom, France, Brazil, India, Thailand, Malaysia, Singapore, Indonesia, Hong Kong, Taiwan, Japan, New Zealand, Fiji and Papua New Guinea. Syme was usually accompanied by Lady Syme and sometimes by directors and managers of BHP, such as L. Gordon Darling and Geoffrey Heeley. Most volumes have indexes of people met and places visited.