Ruth Murray Underhill (1884-1984) was a social worker, anthropologist, and teacher. She studied the Papago tribe of Southern Arizona while attending Columbia University. The collection includes her manuscripts, minor correspondence, and mementos of George W. Ingalls (1838-1920), Indian agent and superintendent of religious work among Indians for the American Baptist Home Mission Society.
Herbert Spencer Zim (1909-1994) was a teacher and author in the field of science. His works in this collection reflect his work in the science field. Sonia Bleeker Zim was an editor for a publishing house and a writer of youth books. Her work in this collection represents her career as a youth author.