The fonds consists of professional papers, architectural and silver artifact photographs, drawings, teaching materials, research files on historical buildings in Québec, and heraldry designs for Boy Scouts. The bulk of the fonds consists of professional papers and three-dimensional objects (1889-1949). These have been arranged into twelve categories based on function: notes by Traquair for architecture curriculum courses; personal items of Traquair; signed notes of Gordon Antoine Neilson; signed notes of Marius Barbeau; Boy Scouts' flag design and correspondence; drawer list of drawings of French-Canadian architecture as arranged by Traquair; source clippings/publications; student sketchbooks; historic notes on individual places; publications of Traquair; publications by others working in the field or allied fields; line blocks. 14 original drawings in the fonds date from 1901-1921 and include watercolours and drawings of Egypt and India as well as details and sketches of churches in England and Italy. There are also approximately 550 measured drawings of historic buildings in Montréal, Québec City and elsewhere in the province made by Traquair and his students. Approximately 5 m of photographs portray landscapes, historical buildings, furnishings, and rural people at work in Québec; some copies of historical prints and photographs are also included. The historical architecture of Québec is also the subject of 1 m of plastic negatives, and a further 40 cm shows old Québec silverware.

"Professional Papers, 1964-7, 3 cm." Correspondence, specifications, notes and clippings relating to the design of the Manoir Comeau in Baie Comeau, PQ (1966-7) and alterations to the Canadian Society for the Prevention of Cruelty to Animals in Montreal (1964-5), comprise the archive's holdings of this architectural firm.

"Documents professionnels, 1964-1967, 3 cm." De la correspondance, des cahiers des charges, des notes et des coupures de presse se rapportant aux projets du Manoir Comeau à Baie-Comeau (Québec) (1966-1967) et des modifications à l'immeuble de la SPCA à Montréal (1964-1965).

"Architectural Drawings, 1964-7, 19 drawings." Drawings for alterations to the Canadian Society for the Prevention of Cruelty to Animals building on Rue Jean Talon in Montreal and to the Ross house on St. Sulpice Road in Westmount, as well as drawings of the design of the Manoir Comeau in Baie Comeau, PQ, are found in the archive.
"Papers, 1964, 5 cm." The collection includes correspondence and invoices relating to the design and construction of alterations to the house of J. K. M. Ross on St. Sulpice Street in Westmount.

"Dessins architecturaux, 1964-1967, 19 dessins." Dessins d'un projet de modifications à l'immeuble de la SPCA rue Jean-Talon à Montréal et à la maison Ross, chemin Saint-Sulpice, à Westmount ainsi que des dessins du Manoir Comeau de Baie-Comeau (Québec).
"Documents, 1964, 5 cm." La correspondance et les factures rattachées au projet de modifications à la maison de J. K. M. Ross, chemin Saint-Sulpice à Westmount.

Fonds consists primarily of original working drawings in pencil on tracing paper, and paper files, dating from the 1950s, 1964 and 1982, including projects:
"Chambly County High School, St. Lambert, QC," 1952, 11 drawing sheets
" New Factory and Offices for the Gliddon Company Ltd.,Ville Lasalle, QC," 1954, 11 drawing sheets
"YMCA Southwestern Branch, Montreal, QC, 1958," 8 drawing sheets, and Architectural, Electrical, and Mechanical Specifications
"Zone Office and Warehouse for General Motors Products of Canada Ltd., Pointe Claire, QC, 1959," 24 drawing sheets
"General Motors, Montreal Truck Branch, 1964," 11 drawing sheets
"St. Andrews United Church, Ville St. Laurent, PQ, 1956," 20 drawing sheets, 3 sheets correspondence, 1982.
"Office Building for Canadian Overseas Telecommunications Corp., Belmont Street, 1955," 54 drawing sheets
"Perry & Luke"
"Hermitage Club, Magog, PQ, 1928," 14 drawing sheets