Fonds consists of architectural drawings (1961) and 2 photographs forming part of a project prepared for the United Nations for low-cost asbestos roof-tiling. A four-page application (1967) for low-cost roofing is also included. Ortega's personal library (713 cm) also comprises part of the fonds. These books and periodicals relate mainly to Ortega's professional interests such as low cost housing, building materials, water and sanitation, the environment and energy. 287 slides relate to Ortega's on-going concerns on lost-cost housing, building materials, construction methods and alternative sources of energy.

"Dessins architecturaux, 1961, 46 dessins." Les dessins faisaient partie d'un projet réalisé pour les Nations unies et portant sur des tuiles de toit en amiante à faible coût. Ce matériel n'a pas été décrit.
"Photographies, 1961, 2 photos." Ces photos se rapportent au projet mentionné ci-dessus. Ce matériel n'a pas été décrit.
"Activités architecturales, 1967, 2 cm." Le dossier contient un formulaire de quatre pages de demande de toit à coût modique. Il n'a pas encore été décrit.
"Bibliothèque personnelle, s. d., 7,13 m." Ces livres et Périodiques se rapportent avant tout aux intérêts professionels d'Ortega tels l'habitation à coût modique, les matériaux de construction, l'eau et la salubrité, l'environnement et l'énergie. Matériel en cours de traitement.
"Diapositives, s.d., 287 diapositives." Celles-ci illustrent les projets de recherche d'Ortega sur l'habitation à coût modique, les matériaux et les méthodes de construction et les sources alternatives d'énergie. Ce matériel n'a pas encore été traité.

Traquair's papers largely concern his work as a lecturer. School of Architecture lectures in architectural history cover the classical, mediaeval and modern periods (ca 1935-1936), while those on architectural ornament are largely devoted to lettering. Miscellaneous lectures, about 30 in number, were delivered between about 1924 and 1937 to various audiences, such as school children, extension students and members of art and architectural associations. They deal with architectural history, architectural principles both aesthetic and social, and other art forms (painting, carpets, heraldry etc.)

Material relating to Traquair's publications includes drafts of about 15 articles on many of the same topics as the lectures described above, and stemming from the same period. A special series of notes and manuscripts, together with some correspondence, illustrates Traquair's research on Québec arts.

The fonds contains the professional papers of Canadian-American architect Witold Rybczynski. They comprise textual records including book manuscripts and proofs, research materials, reviews, correspondence, and teaching material, as well as slides and digital files representing his career as an author and educator.