Fonds consists of the following series: Correspondence, 1947-1995; Autobiography manuscripts, 1948-1995; Photographs, 1948-1980; Writing, 1940-1996; Subject files; Newspaper subject files; Newspaper reprints; Newspapers, 1958-1978; Scrapbook of B.C. provincial campaign, 1975; Recording of meeting with Andy Bigg and staff of Cowichan Pictorial regarding joining Union, 1973. The Newspapers include: a complete set of the Western Advocate, 1958-1959, and a complete set of front covers of the Cowichan Pictorial, 1966-1978.

Fonds consists of records created and used by Segger in his activities with the B.C. Heritage Trust and Advisory Board, the Heritage Canada Foundation, the City of Victoria Heritage Advisory Committee, the Esquimalt and Nanaimo Railway Committee, and with projects by University of Victoria students in architecture history. Fonds includes summaries of heritage preservation projects, minutes, correspondence, architectural drawings, newsclippings, policy statements, proposals for scholarships and building projects, newsletters, conference material, zoning information, flow charts, membership surveys, and architectural history projects undertaken by Segger's students; records of Segger's books and articles about Samuel Maclure; and, copies of photographs of houses designed by Maclure.