The fonds consists of architectural plans and drawings by Di Castri for homes and buildings in Victoria and other locations in B.C. Fonds also includes notes, correspondence, construction contracts and photographs of commissioned projects, as well as portfolios, proposals, articles about Di Castri, notebooks, and manuscripts.

The fonds consists of approximately 550 presentation drawings, sketches, conceptual drawings, working drawings, technical drawings (inclusive of blueprints), travel sketches and photographs. These include exterior and interior renderings of plans and designs for work produced in both Europe and in China. The architectural collection consists of works by Hudec and two other unknown authors. The work of Hudec is transcribed in English, German and Chinese characters. The work of the unknown authors is transcribed in Hungarian and German. There are also 2 boxes of textual records including notes, notebooks, photo albums, documents, letters, memos, scrapbooks, photos, legal records, rare journals, and newspapers clippings.

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.