Leacock's papers comprise manuscripts of books, articles, and speeches written ca 1913-1937: included are Leacock's history of Montréal, and comic pieces such as "Too Much College", "The Stamp Album World", "Simple Stories of Success" and "Bed-Time, Stories for Grown-Up People". Correspondence covers the period ca 1915-1944. There are also newspaper articles by and about Leacock; book orders and related correspondence; manuscripts of articles and speeches about Leacock; and correspondence concerning donations to the Leacock Collection (Approximately 1948-1960).

Three letters from Seaton relating to the Rebellion of 1837, including a letter to General Fitzroy Sommerset about the capture of St-Eustache.

The Sir William Osler Collection, distinct from the Bibliotheca, is an extensive archival holding of Osler's correspondence (including eighteen hundred original letters), daybooks, accounts, engagement books, legal documents, book invoices, membership certificates, notebooks, lectures, addresses, newspaper clippings, photographs, books with manuscript additions, and miscellaneous loose items formerly inserted into individual books in his library. The collection also contains various family papers, including correspondence of Lady Grace Revere Osler and Edward Revere Osler.

Fonds consists of correspondence and literary manuscripts, documenting all aspects of MacMillan’s career. Biographical background is provided by his own notes on his life and family history. From his student years come certificates and testimonials in support of his application for a Rhodes Scholarship (1904-1909). His war experience is recorded in letters from the front preserved by his family, and by a personal diary for 1917. There are also approximately twenty photographs of Macmillan and his family taken between about 1905 and 1940.

Macmillan's correspondence includes files of letters to his wife (1917-1936) on his war service and political affairs; personal and social letters (1923-1929); political correspondence, including several letters from McKenzie King (1926-1946); letters concerning McGill, including a number from Sir Arthur Currie and from Stephen Leacock (1920-1947); post-retirement correspondence on McGill and public affairs; and correspondence concerning his publications (1920-1960). There are also files of invitations to events at McGill and elsewhere.

The manuscripts fall into two categories: political speeches and literary manuscripts. Besides notes and texts for his own speeches, there are also texts of, and newspaper clippings about speeches written by Macmillan for Sir Arthur Currie and others (1920-1950). Drafts and typescripts of his literary works are supplemented by notes, clippings and correspondence.

The fonds primarily reflects Pappius’s activities as a researcher at the Montreal Neurological Institute-Hospital (MNI/H): both her experimental research as such and various support activities, including academic publication, coordination of research projects with colleagues, and acquiring funding. It also contains much information about her leadership of the Clinical Neurochemistry Laboratory. The fonds contains smaller amounts of documentation regarding her activities as a professor at McGill University, her administrative roles at the MNI/H, and her participation in professional organizations, which reflects the smaller place that those roles occupied in her professional life.

The period of time best documented in the fonds spans the early 1980s to Pappius’s retirement in 1995. Correspondence with colleagues, mostly though not exclusively work-related, contains relatively more material from Pappius’s early career; although, here too, most of the material dates from the 1980s and after.

The main document types in the fonds related to Pappius’s research activities are experiment worksheets and printed tabular research data. Many of the research-related files contain negatives of autoradiographies, with a smaller number of photographic prints. Correspondence can be found in many series besides series F (Correspondence), as much of Pappius’s work was collaborative in nature.

The fonds is divided into eight series: (A) Research, (B) Academic events, (C) Teaching, (D) Administrative activities, (E) Professional organizations, (F) Correspondence, (G) Personal collections, and (H) Visual documents.

This fonds contains records and supplementary material covering all three major aspects of the life of John Wilson McConnell: business and finance, social and philanthropic commitments, and family life. The records covering these subjects stem mainly from ca1898 to the time of McConnell’s death in 1963. Additional financial records exist past this date into the early 1970s due to the trusts administered by McConnell’s legacies. The nature of the records is reflected in the following series: 1) Correspondence; 2) Scrapbooks, Journals and Address books; 3) Personal and Family records; 4) Philanthropy; 5) High society; and 6) Business Commitments. The records in Series 4 and 5 are further subdivided into subseries: Philanthropy and Fundraising (Hospitals and Health Care; Higher Education; War Efforts); Business Commitments (Promotion; Commercial Trust Co.; Montreal Star; St. Lawrence Sugar Refineries; Property Holdings).

The fonds chiefly consists of materials that Madeleine Parent gathered or created as a labour organizer and activist. The United Textile Workers of America series (B) and the Canadian independent unions series (C) make up the bulk of the fonds. Series B and C relate to Parent’s activities as Secretary-Treasurer of the Canadian District of the United Textile Workers of America (UTWA) and the Canadian Textile Council (CTC), later the Canadian Textile and Chemical Union (CTCU). Parent’s union activities closely connect with Robert Kent Rowley, with whom she co-founded the CTC. Series C also documents Parent’s work for the Confederation of Canadian Unions (CCU), including files on member unions. Documentation includes meeting minutes, collective agreements, financial documents, correspondence, labour publications, and photographs. Series B and C also detail strikes in Quebec and Ontario organized by the UTWA Canadian District, CTC, and CTCU. Some of the strikes include the Dominion Textile Company Limited strikes in 1946 and 1952, Harding Carpets Limited in 1956, Artistic Woodwork Company Limited in 1973, and the Puretex Knitting Company Limited strike in 1978.

The smallest of the series, D and E, document the legal proceedings for the 1947 charge laid against Parent for seditious conspiracy and Parent’s campaign for Montreal City Council in 1954. Series F and H document Parent’s women’s and social justice activism, predominantly from the 1970s until the early 2000s. Among the records are files regarding her work with the National Action Committee on the Status of Women (NAC) and her advocacy for immigrants’ rights and indigenous rights, such as her support for Mary Pitawanakwat, an Ojibway woman unjustly dismissed from the federal civil service. Social justice files relate to various topics, including nuclear phaseout, workplace health and safety, peace activism, and human rights violations.

Personal papers, found in series A, include family documents and photographs, personal correspondence, and Parent’s agendas, research notes, and writings, as well as documentation related to interviews. Much of this material relates to labour and social justice activism and her activities as a labour organizer. The final series, H, consists of Rowley’s personal papers compiled by Parent. Included are files of correspondence, writings, and notebooks, as well as materials created about Rowley posthumously regarding his biography and tributes to him after his death.

The fonds also documents Madeleine Parent’s social and political activism, especially in the years following her retirement from the union in 1983, through correspondence, speeches and lectures, newspaper clippings, minutes, agenda books, 1948-2009, telephone journals, 1990-2005, photographs, as well as audiotapes of interviews and speeches. There are records concerning her involvement in public campaigns concerning such issues as free trade, 1987, de-indexing of family allowances, 1985-1986, freedom of choice/abortion rights, 1986-1987, Charlottetown Accord, 1992 and the human rights case of Mary Pitawanakwat, 1994-1995. Some of these campaigns reflect her involvement in the National Action Committee on the Status of Women.

Also included are documents pertaining to her personal life including family documents, correspondence, biographical information, photographs, and diplomas.

This fonds also contains personal and labour-related writings, including articles, letters to the editor, book reviews, reports on union activities, notes on Canadian history, and correspondence of Kent Rowley, 1942-1975.

Collection consists of correspondence from J.W.A. Hickson between 1912 and 1956.

The collection consists of four early Irish manuscripts assembled by the Montreal collector Edward Murphy as part of his private library. The manuscripts include a copy of The Midnight Court (Cúirt an mheán oíche) by Brian Merriman, the Life of St. Patrick by John Chambers, Tri Biorghaoithe an Bhais (Three shafts of death) by Geoffrey Keating, and a fragment of an Irish vocabulary (Nuadhfoclóir bogcruaideach).

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.