This fonds primarily contains personal papers, publications, and oral histories (ca. 1870-1984) relating to the Basilian Fathers who served as teaching staff for Assumption College and Assumption University. Included are diaries, notebooks, correspondence, memoirs, recorded interviews, memorials, manuscripts and published works. Of special note are the extensive papers of Bishop Leo C. Nelligan, records of O’Connor House, and a few records from Rev. Pierre Tourvieille. Secondarily, this fonds contains extensive administrative records documenting the history of Essex College, found in the papers of professor W.H. Arison.

This fonds contains records connected with 22 Superiors or Presidents of Assumption College and University, ca. 1861-2009. For the most part it is organized chronologically by individual, although later accruals to the fonds have led to some quirks in file numbering or arrangement. Much of the fonds consists of administrative correspondence connected with institutional matters. There are also photographs, reports, publications, statistics, and notes on various subjects.