Fonds consists almost entirely of materials created or acquired by Harry Adaskin throughout his life and career. It includes the manuscripts for his autobiographies, correspondence, scripts for radio broadcasts and lectures, newspaper clippings, and concert programmes, photographs, films, and audio recordings. Also included are annotated copies of Adaskin's two autobiographies: A Fiddler's World (published in 1977), and A Fiddler's Choice (1982). Some outside correspondence addressed to his wife Frances after his death is also included. The fonds is organized in the following series: Autobiographies, Hart House String Quartet, Harry and Frances (Marr) Adaskin Concerts, Musically Speaking Scripts, New York Philharmonic Broadcasts, Tuesday Night Scripts, Miscellaneous Writings, Correspondence, Audio Tapes, Autographed Photographs, Audio Discs, and Film.

Throughout his education and political careers, the records were generated by William Bruneau and relate both to personal and professional interests.
The fonds is divided into seven series: correspondence, diaries, research, department of education, history of education quarterly, papers and publications, certificates. The research series is sub-divided into four sub-series. Materials include notes, correspondence, memoranda, papers, diaries, certificates and publications.