Fonds contains three series: Archaeology, German and Personal. Within each series, the material has been organized into subseries such as correspondence, subject files, manuscripts, papers and reports.

The fonds consists of articles, reports and government publications that were amassed by Duff and are related to land claims, government papers, treaties and matters related to Indigenous communities. Included are records on councils, associations and committees, meeting minutes, documents, educational materials, and media-associated materials such as bulletins, Indigenous newspapers, newsletters, and brochures of organizations.