The Cleghorn mss., 1826-1893, consists of correspondence and papers of Indian trader William W. Cleghorn, 1815-1878, and material pertaining to his estate.
The Colfax mss., 1853-1884, consists of the papers of South Bend, Indiana, newspaperman, speaker of the House of Representatives, and vice-president of the United States Schuyler Colfax, 1823-1885.
The Cookery mss., circa 1660–circa 1918, consists of bound and individual writings, often on the topic of cookery, of persons involved with cooking by practice or trade.
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 Corbacho/Pezet mss., circa 1853-1946, consists of manuscripts, correspondence, photos and related ephemeral material covering a variety of topics, with a significant emphasis on U.S.-Peruvian relations from 1853-1929, as well as important diplomatic letters relative to the War of the Pacific (1879-1884).