The Bartholomew mss., 1838-1886, consists of the papers of American businessman, pioneer, and judicial officer Jacob Bartholomew, 1818-1863, and his wife, Emily Ebersole Bartholomew, 1825-1913.
The Cook mss., 1850-1877, consists of letters from David S. Cook in California to his family and friends in Illinois, and letters to James Willson Temple, 1828- , farmer, writer, from his family in Illinois while he was in California.
The Crawford mss., 1849-1864, consists of letters and papers of captain, Quartermaster's department, United States volunteers, and member of the Oregon legislature Medorem Crawford, 1819-1891.
The Harding mss., 1843-1930, consists of the papers of Stephen Selwyn Harding, 1808-1891, lawyer, governor of Utah Territory, and chief justice of Colorado Territory.
The Latin American mss. --Chile, 1548-1890, consists of individual items acquired separately either as a gift, purchase, transfer, or removal from a variety of sources, relating to Chile. Additions continue to be made.