Fonds contains architectural drawings representing twenty-one projects, including:

1. Town of Mount Royal Library; 1966 (26 drawings)
2. Sources Library, Roxboro, Quebec: 1967 (11 drawings)
3. Pointe Claire Library, Pointe-Claire, Quebec: 1973 (31 drawings)
4. Brenninkmeyer Residence, Beaconsfield, Quebec: 1975 (58 drawings)
5. North Hatley Library Expansion & Renovation: 1985 (18 drawings)
6. Bank of Montreal Molsons Bank Building: 1987-88 (16 drawings)
7. Bank of Montreal Main Branch, Place d'Armes, Montreal: 1987 (18 drawings)
8. St-Patrick's Church, Montreal (62 drawings)
9. Office Building, Greene Avenue, Westmount, Quebec: 1985-1990 (135 drawings)
10. McGill Bookstore, Montreal, Quebec: 1987-1990 (91 drawings)
11. Modification to a Barn, Baie d'Urfe, Quebec: 1989 (23 drawings)
12. Andraos Residence, Surrey Gardens, Westmount, Quebec: 1989 (35 drawings)
13. Chapelle du Frere Andre, Oratoire St-Joseph, Montreal: 1991 (22 drawings)
14. Loyola High School, Montreal: 1991 (59 drawings)
15. Restoration of Christ Church Cathedral, Montreal: 1993-1996 (36 drawings)
16. Eglise Notre-Dame de la Garde, Verdun, Quebec: 1997 (8 drawings)
17. Eclairage de la Basilique Oratoire St-Joseph du Mont-Royal, Montreal: 1999 (10 drawings)
18. McGill University Athletic Complex, Montreal: 1992-2001 (172 drawings)
19. Cegep John Abbott, Ste-Anne-de-Bellevue, Quebec (194 drawings)
20. Concordia University Downtown Library, Montreal (204 drawings)
21. Holy Name of Jesus Church, Chomedy, Laval: 1968 (11 drawings)

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.

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.