A semi-autobiographical work by Campbell, who was chosen by Booker T. Washington to serve as the first African American Agricultural Extension Agent in the U.S. and to develop an agricultural extension program for Afro-Americans in the rural South.

The Leon Moyer Estabrook Manuscript is an unbound typescript titled "Life of One American: Memoirs of Leon M. Estabrook." It contains Estabrook's account of his life and work as a statistician and chief of the U.S. Department of Agriculture (USDA) Bureau of Statistics and Crop Estimation. The typescript includes descriptions of the work done in early years of the Bureau of Plant Industry and of USDA scientists, such as B. T. Galloway and Walter Swingle. There is information relating to crop reporting, and some observations on agricultural conditions during Estabrook's travels abroad. He also provided information about USDA buildings.

The Nils Andreas Olsen Collection consists of journals, ledgers, and other account books of the Evans Hardware Company, Princeton, Minnesota, covering functions prior to 1920; records of Alfred Erickson, Washington County, Minnesota; minutes, payroll book, cash books, and other records of the Golden Valley Creamery Association and its member groups, a cooperative functioning from 1908 to 1910; some 19th century military post records; and other miscellaneous material.