The collection spans the years 1907-1971 and covers most facets of Copland's immensely active academic and public life. The correspondence is especially valuable. Most of the letters are accompanied by typed copies of Copland's replies and were received from a great variety of correspondents. Secondly, for the 1920s and 1930s, almost every significant Australian economist is represented. Thirdly, Copland's interest in all of the social sciences and participation in organisations with similar interests are documented principally via the correspondence.