The collection consists of two letters written by Henry F. Perley, the Chief Engineer of Public Works, on January 18, 1886, and January 28, 1886, in Ottawa, addressed to Antoine Gobeil, Esq., Deputy Minister of Public Works of the Dominion of Canada. The first letter details the findings of an examination conducted by Perley on the ongoing construction of the Graving Dock at Esquimalt, B.C. The second letter informs Gobeil of the Hon. Minister's approval of the report.

Collection contains letters, memorial, other documents dealing with the cultivation of hemp in Lower Canada, including those of Jesse J. P. Pennoyer.

The Hellmuth Wolff Organ Collection consists primarily of organ plans, pamphlets, photographs, books and periodicals, and personal correspondence. The majority of these documents are associated with or represent one of the fifty organs in Wolff’s opus. In addition to depicting Wolff’s instruments, the collection of organ plans also includes Wolff’s drawings for proposed but not-constructed organs, plans by other organ builders, and plans drawn by Wolff that are based on historical models and treatises by writers such as Dom Bédos. Of the photographs, most are associated with specific Wolff organ projects and represent a span date of the late 1960s to the early 2000s. Also in the photograph collection are images of historical organs in Europe, which Wolff presumably used in modelling and designing several of his instruments, as well as images associated with other organ projects by builders such as Casavant Frères, Karl Wilhelm, and Rieger, all of whom Wolff worked with before establishing his own workshop in Laval. The collection of pamphlets includes programs, program notes, and concert series information for several of the Recitals and concerts performed on Wolff’s instruments. Of the periodicals and books, titles include The American Organist, Choir & Organ, and Orgelforum. Also in the collection are several three-dimensional models, or maquettes, of Wolff organs.

Collection consists chiefly of photographs of Harold N. Segall, Assistant Professor of Medicine at McGill (1949-1960) and President of the Canadian Heart Foundation, Montreal Cardiac Society, and the Quebec Heart Foundation, as well as his parents, brother Jerry Segall, friends, and colleagues. Photographs depict Segall's childhood and early career. There are also some photographs and textual records relating to Segall's association with professional societies and Montreal hospitals, namely the Canadian Heart Association, Montreal General Hospital, and the Jewish General Hospital.

The collection consists of seven volumes of Elliott's personal diaries, which were bound together, at his own expense, after their completion. These diaries cover the five-year period that Elliott spent serving overseas, primarily in England. The contents of the journals include handwritten entries, sketches and watercolours that were either executed in the pages of the diary or pasted in, and photographs, newspaper clippings, letters, playbills, menus and other paraphernalia that were also pasted into the diary. These serve to document both the development of the war and Elliott's personal experiences. The diaries are generally in chronological order although there are places, particularly in the last three volumes, where the diaries have been bound out of sequence.

The fonds also contains several folio sheets of photographs and clippings regarding Elliott's career.

The collection contains 164 botanical and zoological paintings created chiefly by Elizabeth Gwillim as well as possibly by her sister Mary Symonds while living in Chennai, India (then Madras). The collection includes 121 watercolours of birds with inscriptions, 31 watercolours of fish, and twelve of flowers, drawn from life rather than specimens. The paintings reflect the sisters' time in Madras during which, as artists and letter writers, they created a substantial visual record of the landscape and inhabitants of Madras and environs. The paintings also reflect Gwillim's scientific pursuits, including her study of botany.

The collection consists of a German typescript titled "The Statischen Verhaeltnisse von Tragwerken," written in 1942, along with its English translation, "The Statical Conditions of Structures and the Methods of the Statical Calculation of Structures," completed in 1943. Both versions contain five foldable pages of illustrations.

Collection consists of three albums containing photographs taken at Grenfell Mission and one framed photograph. Albums feature many photographs of St. Anthony and the region, its inhabitants, the medical staff at the Grenfell Mission, and activities such as dogsledding.

Collections consists of holiday greeting cards. Description is forthcoming and will be published as it becomes available.

Contains scores and parts housed in the Performance Library, including chamber music, music for orchestra, and band and choir music, to support the performing ensemble credit courses given at the Schulich School of Music of McGill University.

The Gertrude Whitley Performance Library holds more than 5,000 titles of scores and parts for ensembles of 3 players or more and over 1,000 jazz charts. The collection reflects the ensemble credit courses given here at the Schulich School of Music, i.e. orchestra, baroque orchestra, wind symphony, choir, jazz orchestra, contemporary music ensemble, percussion ensemble, brass choir, and various smaller chamber ensembles such as string quartets, woodwind quintets, brass quintets, etc. In addition, the Library houses the Carl Friberg Collection (band music) and part of the Bruce Bower Gift Collection (bassoon music). However, there is no solo or duet music. In fall 2005, the Library was named the Gertrude Whitley Performance Library, in recognition of the generous philanthropic gift from the Whitley Foundation in the creation of the new facilities for the Performance Library in the new music building.