Papers containing materials created and collected by Philip J. McNiff and his wife Mary Stack McNiff. Correspondence and related enclosures make up the bulk of the collection; there are also many printed materials. Correspondents are generally members of the Catholic, library, or literary communities, particularly those affiliated with Boston College, Harvard University, and other Boston-area organizations. Materials date from circa 1880-1991.

Collection open for research. Audio recordings are not available for playback due to format impermanence and cannot be reformatted by Burns Library at this time.