The collection includes correspondence, literary drafts, notebooks, photographs, newspaper cuttings and other printed material, covering much of Campbell's literary career. There are family papers, including material relating to Campbell's father, Alfred Campbell, and sister, Meg Campbell. The collection also features a RAAF flying logbook kept by Campbell (1939-1945) and a caricature of Campbell by John Frith.
The correspondence comprises letters from family, friends, writers and publishers. Among the correspondents are Bruce Beaver, Alec Bolton, R.F. Brissenden, Vincent Buckley, Nancy Cato, John Couper, Beatrice Davis, Bruce Dawe, C. Day Lewis, Rosemary Dobson, Russell Drysdale, Geoffrey Dutton, Geoffrey Fairbairn, R.D. FitzGerald, H.M. Green, Rodney Hall, Kevin Hart, A.D. Hope, Nancy Keesing, Thomas Keneally, Geoffrey Lehmann, Norman Lindsay, James McAuley, Ronald McCuaig, Nan McDonald, Ann MacLean, James McNeish, John Manifold, Philip Martin, Elyne Mitchell, Les Murray, Roland Robinson, John Rowland, Thomas Shapcott, Kenneth Slessor, Douglas Stewart, Brian Stonier, John Thompson, E.M.W. Tillyard, Russel Ward, Francis Webb, Patrick White and Judith Wright.