Consists of correspondence (handwritten and typescript originals and typescript copies), memoranda, notes, and reports of Stella Virginia Roderick with individuals and institutions in search of Nettie F. McCormick letters. The correspondence contains biographical and genealogical information about numerous persons acquainted with Mrs. McCormick, material about the institutions she was interested in and some recollections about Mrs. McCormick. In addition, there is material relating to Cyrus H. McCormick, lists of Nettie F. McCormick's donations, notes on McCormick descendants, travel itineraries, newspaper clippings and photos, and clippings from magazines and periodicals relating to the McCormick family, their activities and their friends. The material is arranged alphabetically by subject.

Following the above alphabetical administrative file is a section titled “Personal Belongings” (boxes 8 and 9), which includes an inventory and appraisal of the personal belongings of Mrs. McCormick, together with correspondence and a record of the distribution of many of these belongings. This section is arranged alphabetically by subject.

Finally there are two file boxes of note cards. One is a partial alphabetical listing compiled by the Nettie Fowler McCormick Biographical Association of persons and institutions to whom requests were sent for recollections of Mrs. McCormick. Most of the cards contain biographical and genealogical information. The second file box is a chronological day by day listing of the whereabouts and activities of Mrs. McCormick and her parents for the years 1809 to 1923. This list is not complete.

Some of the material is catalogued.