R.H. Wilenski’s papers comprise files relating to Wilenski's published works and to notable artists such as William Blake, Edmund Dulac, Jacob Epstein, Giorgio de Chirico, Amedeo Modigliani, Pablo Picasso, Walter Sickert and Stanley Spencer. These contain correspondence, notes, cuttings, obituaries, lecture notes, proof copies of articles and photographs. There are letters from, amongst others, Michael Ayrton, Cecil Collins, Charles Ede, Jacob Epstein, George Gershwin, Mark Gertler, Eric Gill, Wilhelmina Barns-Graham, Barbara Hepworth, Patrick Heron, Augustus John, Edward McKnight Kauffer, Eric Kennington, Walt Kuhn, Constant Lambert, André Lhote, Mortimer Menpes, Sir Alfred Munnings, Christopher Nevinson, Ben Nicholson, Charles Ricketts, John and William Rothenstein, Naomi Royde-Smith, Michael Sadler, Stanley Spencer, Edward Wadsworth and Ossip Zadkine.
The collection is an important resource for studies of 20th-century art, and for the history of art criticism.