Otto Eisenschiml (1880-1963) was a chemist and an American Civil War historian who published books and articles regarding the assassination of Abraham Lincoln. The collection (1960-1963) contains manuscripts, notes, proofs and related correspondence of the books, Hidden Faces of the Civil War and O.E.: Historian Without an Armchair.
Sidney Shalett (1911-1965) was a freelance writer who also worked for the Chattanooga Times and the New York Times, and in 1947 became a Washington, D.C. correspondent for American Magazine. The collection contains manuscripts written by Shalett and with other collaborators, subject files, interviews with the Roosevelt family, correspondence, biographical material, photographs, and miscellaneous material.