The fonds consists of the following series: biographical material, personal correspondence (1912-1968), addresses (1914-1961), clippings both by and about Eastman (1912-1955), copies of published articles (1909-1957), lecture notes and research material, records relating to the Canadian Institute of International Affairs (1950-1962) and the United Nations Association of Canada (1952-1968), pamphlets/published material and photographs.

The fonds contains fourteen series: Organizational Affiliations (1921to1963), Articles and Reviews (1921to 1956), Correspondence (1876 to1980), Personal Material (1904 to1960), Addresses and Writings (1914 to 1959), Subject Files (1936 to1956), Printed Material (1855 to1965), UBC (1931 to 1952), Sage Family (1915 to 1971), Research Files (19‐‐), Miscellaneous Material (19‐‐), Publications Collected by Sage (19‐‐), Printed Materials Collected by Sage (19‐‐), and Photographs (1913? to 1964) series.

The fonds consists of records that Bourne made, received, and collected during his student and professional careers. The records document his interests in and involvements with academia, law, and law associations at the institutional, provincial, national, and international levels. The fonds includes correspondence, reports, minutes, clippings, published and pre-published material, manuscripts, reviews, grant documentation, maps, and notes. The fonds is composed of the following series: 1. Biographical; 2. Personal correspondence; 3. Canadian Bar Association - Committee on Constitutional Law; 4. University of British Columbia; 5. United Nations Association; 6. Canadian Institute of International Affairs; 7. International Law Association; 8. Academic Board of British Columbia; 9. Canadian Yearbook of International Law; 10. Canada Council; 11. Subject files; 12. Class notes / Lecture notes; 13. Great Lakes Water Quality Agreement.