Consists primarily of the papers of the British publishing firm of Calder & Boyars Ltd. Also included are the papers of its predecessor John Calder (Publishers) and the personal papers of John Calder, 1927- . A few personal papers of Marion Boyars, 1928-1999, are also present.
The Mayröcker mss., 1970-1974, consist of correspondence and translation drafts of correspondence between poet Friederike Mayröcker, Johannes Käfer, and Samuel Beckett.
The Mitchell/Beckett mss., circa 1937-1992, consist of letters, manuscripts, and materials about author Samuel Beckett, 1906-1989, collected by Indiana University professor and Beckett bibliographer, Breon Mitchell, 1942- .
The Schlechter mss., 1982-2006, consists of sketches, trials, and mock-ups of the artist book of Samuel Beckett's Mahood created by Susanne Schlechter, 1961-.
The Starkey mss., 1891-1956, consist of letters and papers of James Sullivan Starkey, 1879-1958, (Seumas O'Sullivan, pseud.), as editor of the Dublin Magazine.