The Lieber mss., 1691-1945, are papers of Richard Lieber, 1869-1944, director of the Indiana State Department of Conservation from its creation in 1919 to 1933.
The Lincoln mss., ca. 1798-1959, consist of letters, documents, and facsimile copies of documents by and about Abraham Lincoln, 1809-1865, his ancestors, immediate family, members of his cabinet, and other persons closely connected with him.
The McCulloch mss., 1766-1914, consist of letters and papers of Hugh McCulloch, 1808-1895, U.S. Comptroller of the Currency, Secretary of the Treasury, and a partner in the London banking house of Jay Cooke, McCulloch & Company.
The Ralston, B.M.K. mss., 1873-1943, are the letters and papers of realtor of Indianapolis, Indiana and brother of Governor Samuel Moffett Ralston, Boyd Mercer Kerr Ralston, 1860-1944.
The Ralston, Jennie Craven mss., 1894-1950, consists of the papers of Indiana's Democratic National Committeewoman and wife of Samuel Moffett Ralston, Indiana Governor and US Senator, Jennie Craven Ralston, 1861-1954.