Records of Thomas Howarth, relating primarily to his activities as an architecture student at the University of Manchester, and as a professor and administrator there and at the Universities of Glasgow and Toronto, as a professional architect, and as an authority on Charles Rennie Macintosh. Included are correspondence, notes, minutes, course and lecture notes from the British universities; course material, student assignments, term projects, class reports, and theses for the Department/School/Faculty of Architecture in the University of Toronto; files on conferences, seminars, professional and other organizations of interest to Dr. Howarth; sketches for and other material relating to the building of Laurentian University and York University (including Glendon College); records of the University of Toronto Architecture Club (1919-1929, 1943-1948); drawings, plans, photographs, glass-plate negatives, slides, posters, audiotapes, film, and printing blocks.