1. Rodney G. Dennis, introduction to The Robert Lowell Papers at the Houghton Library, Harvard University: A Guide to the Collection, comp. Patrick K. Miehe (1990), p. ix.
2. Dennis, The Robert Lowell Papers at the Houghton Library, p. x.
3. Frank Bidart, July 1, 1988 cover letter to MS Storage 244, Houghton Library.