Correspondence, manuscripts, typescripts, research files, documents, printed materials, photographs, and memorabilia of Mr and Mrs Hough. Correspondence includes both personal and business letters, dealing with wildlife conservation, civic interests, and birding. There is some correspondence of George A. Hough, Sr., father of H.B. Hough, who was editor of the New Bedford MA Standard. Most of the correspondence is arranged alphabetically, by personal name or subject, out-going and in-coming filed together. Henry and Elizabeth Hough's correspondence, for which there are no in-coming or related letters, are filed chronologically. Cataloged correspondents include Calvin Coolidge, Max Eastman, Helen Keller, John F. Kennedy, Emily Post, and James Reston.

The correspondence, research, and teaching files of French-American cultural historian and Columbia University professor emeritus Jacques Barzun (1907-2012).

Correspondence, research notes, articles, clippings, photostats, and photographs. These files concern his interest in Pierre Bayle, Antoine Arlier, and the Renaissance in Provence, as well as the Romanic Review, philology, French, Spanish, and celtic studies. Among the correspondents are: Philippe Berthelot, Nicholas Murray Butler, F.R. Coudert, John H. Finley, the Prince de Ligne, Curtis Hidden Page, William B. Parsons, and Aime ́Puech.

The collection includes two diaries of his American tour (one is made up of his rough travel notes, the other is in edited form for circulation), a memorial volume of manuscripts about his wife (Ann Loxley Rhees) prepared by his daughter Eliza (Mrs. Nicholas Murray), and 1851 passport of Nicholas Murray, a letter of Thomas Chalmers Murray to his sister Mary Jones Murray Butler (the mother of Nicholas Murray Butler, President of Columbia University), correspondence between Welsh historian Gwyn A. Williams and collection donor Mary Butler Brown, an essay entitled "Morgan John Rhees and Beula" by Gwyn A. Williams, Ann Loxley Rhees's valedictory oration on graduation from Philadelphia's Ladies Academy, an address on female education ca. 1789, family obituary clippings, poems, misc. items, and a photograph of Ann Loxley Rhees. An edited version of substantial sections of the diaries of M.J. Rhees was published in John Thomas Griffith's 1910 biography and miscellany of Rhees and his family, a copy of which is included in this collection. An edited version of a previously unpublished section of the diary, from May 2nd to July 9th 1795, was published in Northwest Ohio History (vol. 80, no. 2), but it is an unreliable transcription containing many inaccuracies, according to Dr E. Wyn James of Cardiff University, who is working on a new edition of the M.J. Rhees diaries.

The V. K. Wellington Koo papers document the diplomatic legacy of Wellington Koo as a Chinese statesman and diplomat of the 20th Century. The papers primarily consist of materials collected during Koo's diplomatic career, relating to the Lytton Commission, 1932-1933; the League of Nations, 1931-1940; the United Nations, 1944-1946; his ambassadorships to France, 1932-1941; to Britain, 1941-1946; to the United States, 1946-1956; as the Senior Advisor to the Republic of China from 1956; and as the Judge on the International Court of Justice, 1957-1966. The materials include correspondence, diaries, memoranda, manuscripts, documents, notes, speeches, maps, photographs, printed material, and audio visual material. The bulk of the materials emphasizes China's domestic and foreign affairs, such as the Sino-Japanese conflict, World War II and the Cold War in the Far East region, as well as the League of Nations and the United Nations.

The Willard L. Severinghaus Papers include the personal and professional papers of Columbia University Physics professor Willard Lesly Severinghaus, as well as a small amount of material related to the extended Severinghaus family. There are also record books from the Terre Haute, Indiana German Methodist Episcopal Church where Severinghaus's father, John F. Severinghaus, was pastor.