The fonds consists of seven accruals which have been combined. The first two accruals are arranged into 15 series consisting of incoming correspondence, outgoing correspondence, Cambridge Magazine correspondence and related material, Heretics correspondence and related material, Orthological Institute and Basic English Foundation correspondence and financial material, other Basic English material, manuscripts, diaries and notebooks, articles and publications relating to Ogden and Basic English, photographic and family material, publications received, notes and catalogues relating to Ogden's book and stamp collection, pictorial material and gramophone records, Cambridge Magazine issues and Psyche photocopies.

The third accrual (01-1993) consists of two letters from Siegfried Sassoon. The fourth accrual (12-1993) consists of two groups of letters relating to the Heretics Society and the Cambridge Magazine. The fifth accrual (22-1993)consists of Ogden's letters to Valerie Winslow. The sixth (05-1994) accrual consists of financial ledgers concerning the sales of Basic English publications. The seventh accrual (08-1997) consists of a post card from Ivy Litvinoff and a book. These accruals have been interfiled with the first two accruals.

The fonds consists of 53 black and white photographs and photographic postcards, most showing World War I aircraft. Many have messages or annotations on the reverse side. They have been organized into five groupings: those showing Bruce Doherty, those identified as Toronto, those identified as Texas, those showing airmen and aircraft, and others (includes one Christmas card).

The fonds consists of two albums containing short accounts by soldiers at the hospital of their war-time experiences, as well as poems and addresses.

The fonds consists of Russell's manuscripts, correspondence, library, periodicals, offprints, leaflets, photographs, audio discs, audio reels, audio cassettes, films, videocassettes, microfilms, news clippings, posters, some furniture, artwork (including a bust by Jacob Epstein), awards and medals. Also included are records of the Bertrand Russell Peace Foundation, including those that relate to the International War Crimes Tribunal. The archive is supplemented by a supporting research library of books, theses about Russell, and his publications in periodicals. The fonds also contains the archives of Russell's parents, Viscount and Viscountess Amberley. The fonds has been supplemented with ongoing acquisitions of original material from a variety of sources, as well as copies of selected material held elsewhere.

The fonds consists of correspondence, manuscripts, a presentation copy of A Canadian Twilight, and printed material, as well as additional material related to Trotter.

The album contains 191 photographs. Subjects of the photographs include training at the riding school in Ottawa, the troops en route on the Adriatic, and photographs of time spent at Shorncliffe and Crowborough. Some photographs were taken at the Perkins Bull Hospital for Convalescent Canadian Officers and the Shrewsbury Aerodrome AAP. There are also photographs of Ireland, particularly Cork-Killarney.

Fonds consists of correspondence with four enclosures and two newspaper clippings. Correspondence amounts to 77 letters by Albert E. Adams to his mother Sarah (Heighes) Adams and one letter to his sister Elsie Adams. Enclosures consist of British propaganda literature to be dropped over German lines, two humourous military publications by Pte. W. Silk, and a battalion Christmas card, in which are listed all officers of the 134th Battalion, including Adams. One newspaper clipping concerns his death, taken from the Toronto Star of 8 October 1918. The other clipping, from an unknown source dated 26 August 1926, concerns the battle of Arras-Cambrai, in which Adams died.

The fonds consists of correspondence, photographs and realia. There are letters from all three sons to their mother and their father as well as letters from their father to their mother, one letter from Donald to Ronald, news clippings and post cards. There are also two b&w photographs of French people and one b&w photograph presumably of Elizabeth Agnew, a handkerchief embroidered with the flags of various nations, a pencil and crayon sketch of a house, and money issued by Germany during its occupation of Belgium.

The fonds consists of original materials (and many holograph copies) created by Adrian Grant Duff and others, as well as research notes and extracts /of original materials created by his daughter, Shiela.

The scrapbook contains approximately 55 black and white photos (approximately half are originals, the others are good quality reproductions), 3 colour photographs, news clippings, maps, and other material related to the Battalion.