The fonds consists of records relating to Saddlemyer's research on "Letters to Molly: John Millington Synge to Maire O'Neill" (1971), "Lady Gregory: Collected Plays" (1971), "Anglo-Irish Writers, 1911-1969", and the W.B. Yeats Symposium. The fonds include typescripts, galley and page proofs, correspondence, and a complete set of the typescripts of essays presented at the Yeats Symposium.