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.

Correspondence, manuscripts, notes, memoranda, notebooks, notecards, proofs, photographs, microfilms, and printed materials. The Papers include the manuscript research materials and correspondence for each of his books except his biography of Theodore Dreiser. Among the correspondents are William Benton, Bruce Catton, Carey McWilliams, Mrs. Fremont Older (Cora Miranda Baggerly Older), and Thornton Wilder.

The Wallace K. Harrison architectural drawings and papers consists of architectural drawings, photographs, correspondence, notes, speeches, manuscripts, press releases, clippings, memoranda, printed material, job lists, curriculam vitae, contracts, articles, and other material related to Harrison's architectural projects. The collection also contains a significant amount of material regarding Harrison's position as director of the Office of Inter-American Affairs, director of planning of the United Nations Headquarters and biographical material. Approximately a third of the collection is made up of photographs. Photographers include Wendy Barrows, Shirley Burden, George Cserna, Y[uzo] Nagata, and Ezra Stoller, among many others. There is also a collection of 148 art books that belonged to Harrison referred to as his "doodle books." A list of these books with brief descriptions of where Harrison drew in them is contained in the finding aid. Projects documented include Lincoln Center, Metropolitan Opera House, Rockefeller Center, Albany Mall (Empire State Plaza), United Nations, X City, ALCOA building, Corning Glass building, First Presbyterian Church, La Guardia Airport, Socony-Mobil building, Battery Park City, Radio City Music Hall, New York World's Fair (1939 and 1964), Institute for Advanced Study, National Academy of Science, Pahlavi National Library Competition, Oberlin College's Hall Auditorium, Pershing Memorial, Rockefeller University, Hopkins Center, The Anchorage, Avila Hotel, and numerous other buildings and residences.

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.

Correspondence, manuscripts, notes and printed materials concerning Robinson's work at the University of Pennsylvania School of Social Work and her publications which include a memorial volume about her colleague, Jessie Taft.

The collection includes the original manuscript of "Surrender on Demand", Mr. Fry's account of his wartime experiences, which was later rewritten for young readers as "Assignment Rescue" (New York, Four Winds Press, 1968). Among the correspondents represented in the collection are Marc Chagall, Jacques Lipchitz, Roger Baldwin, Norman Thomas, J. Edgar Hoover, and Herman Wouk. In addition to the material relating to the Emergency Relief Committee (later known as the International Rescue Committee), the collection includes correspondence and papers concerning Fry's work as a writer on foreign affairs as well as copies of his books.

This collection consists of correspondence, business records, and appraisal drafts relating to the University Place Book Shop and its owner and proprietor, Walter Goldwater. The collection also includes material pertaining to Goldwater's involvement in the Marshall Chess Club.

Proofs, photographs, photostatic copies, and other printed materials of Roscoe. Included are proofs and illustrative materials for his book The Web Of Conspiracy; The Complete Story Of The Men Who Murdered Abraham Lincoln, and a printed copy of his book, Only In New England, a book of crime fiction.

Letters written to Gay from political and literary contemporaries such as Horace Greeley, Charles Sumner, and William Bryant; reports in letter form from his reporters at the front during the Civil War; and personal correspondence including many letters from his wife, Elizabeth Neall Gay. Letters written to Mrs. Gay from family friends and business associates including many from her husband. Correspondence of other members of the Gay family including Walter Gay, Sarah Gay, and Allan Gay. Diaries, notebooks, and journals of Sydney Howard Gay.

Various letters and manuscripts by and about Sir Osbert Sitwell (1892-1969), Dame Edith Sitwell (1887-1964), and Sir Sacheverell Sitwell (1897-). There are 2 notebooks which Dame Edith Sitwell inscribed to Siegfried Sassoon containing drafts of her poem "Gold Coast Customs" as well as numerous other drafts of prose and poems.