Gareth and Janet Dunleavy were historians of Irish literature and culture. The Gareth and Janet Dunleavy Collection was donated by Gareth and Janet Dunleavy in memory of Bernard Benstock, a colleague who served the University of Miami in many capacities.

The collection contains typescripts and articles by Gareth and Janet Dunleavy, as well as research materials for projects by both authors. Prominently featured are research materials on Mary Lavin, an Irish short story and novella writer who died in 1996. Of special interest among these research materials are copies of Lavin's working manuscripts, obtained by Professor Janet Dunleavy in the 1970s with the permission of Mary Lavin. Janet Dunleavy had planned a critical study of Lavin's work based on these materials, but had abandoned the idea. The collection also contains notes, letters, and other documents assembled during Gareth and Janet Dunleavy's preparation of their Douglas Hyde: A Maker of Modern Ireland (1991) and O'Connor Papers (1977).