The Helen B. Ryan papers date from 1976 to 1984. The collection comprises 2.5 linear inches relating mainly to Ryan’s book, Endless Rapture, which she wrote under the name Helen Hazen. The collection is arranged in two series: Correspondence and Professional.

The Correspondence series contains numerous letters from Ryan’s editor, Jacques Barzun of Scribner’s Sons. His letters include critiques of her writing and ideas for research. The series also contains some correspondence from readers of her book.

The Professional series contains newspaper clippings that Helen B. Ryan found relevant for her research, as well as clippings of book reviews and reactions. Included is a partial manuscript of her book, with extensive edits by Barzun. The manuscript, which most likely contains multiple drafts, is in numerical order, though there is no continuous narrative.