Correspondence and Personal Material: includes several letters from Sarah to her sister Harriet Skilton forshadowing her death; includes several letters from Harriet Skilton expressing concern about Harriet Cooper's condition; includes a brief eulogy of Sarah;, Dec. 1896

Personal material includes letters, Sarah and her daughter Harriet's diaries, calling cards, photographs, and daguerreotypes.

Included is correspondence of Ella Adams, Philip D. Armour, Rachel Foster Avery, Earl Barnes, Sophia L. Boardman, Nicholas E. Boyd, Lucy Brinkerhoff, Charles O. Browne, F.C. Clarke, Henry C. Dane, John Eaton, Nellie B. Eyster, Helen G. Fairchild, George T. Gaden, Minna V. Gaden, Caroline T. Haven, Phoebe Hearst, Ellen M. Henrotin, Robert G. Ingersoll, David Starr Jordan, Miranda W. Lux, Irena Ingersoll Rawlings, Emma B. Ryder, Caroline M. Severance, William E. Sheldon, Harriet Ingersoll Skilton, Charlotte Perkins Stetson (Gilman), Sarah A. Stewart, Ada van Pelt, E.G. Waite, and Joseph Warren.

Also includes material relevant to works and organizations that Sarah was involved in such as annual reports from Kindergarten Associations, lesson plans from Bible School classes, and programs from meetings of Women's Organizations.