The collection are organized into seven series (Biographical, Correspondence, Legal/Financial, Manuscripts, Photographs, Published Material and Secondary).
The collection is concentrated within the manuscripts and secondary series, both containing materials relating to two of Rittenhouse's books, The Amazing Nellie Bly and Seven Women Explorers. Manuscripts also contains poetry written by Rittenhouse.
Correspondence is both business-related and personal. Correspondence can be found in the series of the same name as well as the Secondary series.
Notable within the Legal/Financial series is a comparison of Rittenhouse's work against titled "Oh My! That Nellie Bly." The collection contains several photographs, two of Rittenhouse.
Series 1: Biographical
Series 2: Correspondence
Series 3: Legal / Financial
Series 4: Manuscript Material
Series 5: Photographs
Series 6: Published Works
Series 7: Secondary Material