There are three letters from Lord Selkirk, one from Lord Dalhousie, and eight from Lady Selkirk. The early letters concern the Red River Settlement and the North West Company. The letter from Lord Dalhousie, 1824, concerns legal matters, and the two late letters, 1828 and 1833, from Lady Selkirk are personal in nature.

This series consists of 14 scrapbook volumes and files of material collected by Wood that were of interest to him either professionally or personally, dated between 1887-1955, but predominately 1926-1941. The scrapbooks and files contain newspaper and periodical clippings, correspondence, printed ephemera, photographs, postcards, palm leaf manuscripts, prints, paintings and other artwork, manuscripts, bookplates, place cards, and textile badges. There are also a few items within the volumes relating to Wood’s research trips and minor writings.
Overall topics within the series include ornithology, Wood’s parrot John III, zoology, naturalists, current events (1927-1941), poems, politics and war, British culture and people, health, obituaries, education, tourism, science and medical research, McGill Library and other institution collections, bird sanctuaries, and bird, ancient, and medieval artwork.
Printed ephemera from Wood’s travels include invitations, programs, brochures, tickets, visitation membership cards, business cards, etc.. There are two volumes (1925-1932) with Saturday Evening Post articles written by Hal G. Evarts, Stewart E. White, David Newell, Bozeman Bulger, Lord William Percy, Donald R. Dickey, and others.
There are 63 incoming and outgoing correspondence, including letters, notes, cards and telegrams. Individuals addressed include Dr. Axel Munthe, Irving Thalberg, Major Allan Brooks, Edith Swan, William Beebe, Chester W. Davis, F. L. Struthers, Elizabeth E. Abbott, W. H. Poole, Thos. Cook and Son Ltd., Margaret E. Hibbard, National Audubon Society, Senator William E. Borah, Stuart Baker, T. S. Palmer, Samuel Casey Wood III, Alan Wood, E. E. Chambers, McGill University, C. F. Martin, George Perley, Emma Shearer Wood, and Wheldon and Wesley. Some topics discussed within correspondence include bird protection, ornithology, travel, holidays, politics, and a speaking event during World War One.
Other individuals represented in this series include Archibald Thorburn, Robert Ridgway, Joseph Addison, M. K. Wisehart, Charles D. Stewart, Dr. George Harlet, Charles Livingston Bull, Dr. Harding, W. J. Belcher, Doris Rosenthal, Marquess of Tavistock, Francis Moore, Karel Fabritius, John Burroughs, T. C. Harrison, R. L. Gallienne, W. H. Bartlett, Harvey Cushing, John H. Sage, Alexander Wetmore, Dr. Andreas Nell, and John G. Howard.
Some locations either visited by Wood or represented in the series include England, Scotland, New Zealand, Australia, Switzerland, India, Sri Lanka, Italy, British Guiana, British Museum of Natural History, Notre Dame Cathedral, Victoria Albert Museum, and Bodleian Library.

This series consists of 399 incoming and outgoing letters and postcards, administrative and financial papers, catalogue lists, bookplates, and manuscripts pertaining to collection development and other library-related activities for the Emma Shearer Wood and Blacker Libraries from 1918-1941. The correspondence relates directly to collection development of these libraries from 1921-1941; however, the years 1931 and 1933 are not present.
Correspondence is primarily between Casey Wood and other individuals, such as Gerhard R. Lomer, Lilian Bates, Elizabeth Abbott, J. H. Fleming, McGill’s Order Department, Henry Mousley, V. C. Wynne Edwards, Margaret Hibbard, Otto Kals, and A. P. S. Glassco, as well as, book dealers, such as Messrs. Wheldon and Wesley and Messrs Bernard Quaritch, Ltd.. Other correspondence is also present between other individuals relating to McGill University Library collections including those donating materials to the libraries and others affiliated with Wood.
Subjects within the collection often concern financial and administrative information, purchases or material requests relating to ornithology, falconry, zoology, and Wood’s research and writing. Within the catalogue lists and manuscripts for the libraries, some relate specifically to medieval, medieval Persian, and fifteenth-century manuscripts. Additionally, this series also includes clippings and photographs exchanged between Wood and Library staff.
Notably, one volume within this series is dedicated to the evolution of the Emma Shearer Wood Library bookplate with the original drawing designed by United States government engraver G. F. C. Smillie and 7 other versions of the bookplates between 1918-1922. The later bookplate was by Bumpus of London designed by M. P. Barrett.

A collection of documents from the life of Simon McTavish including a letter to his creditors and a series of legal opinions on the estate of Simon and William McGillivray. Documents' informational value is largely financial in nature.

Greeley's papers comprise 15 letters, and the original typescript, with handwritten corrections of Chapters 11-18 of Arctic Discoveries.

Fonds consists of letters written to P.M. Roget by various people, 1830-1856.

Consists of an English translation of a letter to the Marquis de la Jonquière written by Antoine-Louis Rouillé, comte de Jouy, secretary of state for the French Navy, at Versailles, dated 28 February 1750. The letter discusses an immediate release of prisoners of war taken during conflicts between the French and British colonies. It also includes a mention of Indigenous allies of England and France, and Indigenous people captured during the conflicts: "the Indian Prisoners among the two Nations be likewise released, but after all the French and English Prisoners are released" The letter also includes the name of examiner Josiah Willard, secretary of the province of Massachusetts-Bay.