The Hughes, Ted mss. II, 1957-1962, consist of letters from poet Ted Hughes, 1930-1998, and poet Sylvia Plath, 1932-1963, to Hughes' brother and sister-in-law, Gerald and Joan Hughes.
The Plath mss. IX, ca. 1972-2012, consists of correspondence between Aurelia Plath (Sylvia Plath's mother) and Olive Clifford Eaton (a neighbor in Winthrop, MA), Mary Alice Ericson (Olive Eaton's daughter), and Margery DeLerno (Olive Eaton's daughter).
The Plath mss. VII, ca. 2012, consist of posters, schedules, handouts, programs and other ephemera related to the events surrounding the Sylvia Plath 70th Year Literary Symposium, 2002 and the Sylvia Plath Symposium 2012 - The October Poems: the Archives and the Creative Process Seminar, which were held on the IU Campus.