In 1954 and again in 1960, Curtis Bradford was able to transcribe previously unpublished manuscripts by W. B. Yeats that remained in the home of Yeats' widow, George. This collection contains the transcriptions Bradford made from Yeats' handwritten and typescript manuscripts. Bradford published a recollection of his work with the manuscripts in the Sewanee Review 77 (1969) 385-404.
A description of this manuscript collection was published by James Lovic Allen and M. M. Lberman, "Transcriptions of Yeats's Unpublished prose in the Bradford papers at Grinnell College." Serif: Quarterly of Kent State University Libraries, 10.1 (1973): 13-27.