The Clark, W.A. mss., 1862-1918, consists primarily of letters from Hoosier soldier William Allen Clark, 1844- , to his parents in Rossville, Indiana, during his service in Company K of the 72nd Indiana Volunteer Infantry Regiment.
The Bryan mss., 1849-1863, are chiefly the letters of George Washington Bryan, 1825-1893, physician, exchanged with his wife, Alice (Calhoun) Bryan, during his period of service in 1862-63 with the Union forces along the Mississippi River on the steamers Glasgow, the Tigress, the P. J. Pringle, and at Young's Point, Louisiana.
The Blair mss., 1843-1881, consists of letters and papers of Montgomery Blair, 1813-1883, lawyer and postmaster general in the cabinet of President Abraham Lincoln, 1809-1865.
The Banta mss., 1836-1888, consists of the papers of James P. Banta, 1814-1873, Civil War soldier of Salem, Indiana, and his wife, Jane P. Lewelling, 1812-.
The Applegate mss., 1863-1929, consists mainly of correspondence between John S. Applegate, 1823-1867, and his wife Elizabeth S. (Lynch) Applegate, 1823-1890, during the Civil War, and letters from Elizabeth S. Applegate to their daughter Alma Etta (Applegate) White, 1855-1930.
The Indiana History mss., 1725-1973, consists of individual items related to the history of the state of Indiana, acquired separately either as a gift, purchase, transfer, or removal from a variety of sources.
The Adair, Lyle G. mss., 1863-1864, consists of the wartime correspondence of Seargeant Lyle G. Adair, 1843-1918, during his service with the 111th United States Colored Infantry.