The Martin Seymour-Smith Collection contains letters from Robert Creeley, Ian Hamilton Finlay, Robert Graves, Donald Hall, Philip Larkin, Tom Raworth, Giles Gordon, Terence Hards, Brian Higgins, Alan Hodge, Judith Nye, James Reeves, and Charles Sisson; notebooks, manuscripts, and/or proofs for many of Seymour-Smith's creative, critical, and biographical publications; photocopies of letters and diaries by Robert Graves; and photocopies of letters by Laura Riding Jackson.