The papers of Katharine Cook Briggs contain two scrapbooks, three folders of genealogical information, and several of her published and private works. The first scrapbook by Cook contains images of Michigan Agricultural College campus, dance cards, concert programs, letters, and other memorabilia. The album begins in 1889 and contains materials through 1894. The second scrapbook consists of a joint photo album in which Cook and Mary Lilian Wheeler demonstrate various photographic printing errors. The folders contain genealogical information on the Chapin and Briggs families. The other folders are primarily manuscripts and drafts of manuscripts which deal with religion and psychology. The main work is titled "Personal Evolution" and is in different sections. There are also smaller works in the collection. In addition to the published works, there are personal and financial papers. Finally there are dream cards in which Katharine and her husband, Lyman Briggs, recorded their dreams.