This collection is composed primarily of correspondence, memoranda, course material, photographs, drawings and slides. The collection is broken down into personal and academic papers. The academic papers pertain mainly to Colquhoun's career as a writer and theoretician and professor at Princeton University's School of Architecture. The personal papers consist mainly of correspondences with friends and family, as well as notebooks, which Colquhoun kept from the 1940s. The visual materials (photographs and drawings) straddle the two categories. Many of the photographs were taken by Colquhoun himself, to be used later in his teaching, while the drawings consist of both student work and reproductions of works from his practice with John Miller. For the majority of the collection, Colquhoun's folder titles have been maintained and the material has been arranged chronologically. The collection is arranged into four series.

Papers of Allen Ginsberg, American poet and one of the founders of the beat generation. The collection contains correspondence, manuscripts, and publications created by Ginsberg and his associates. Note that the main body of Ginsberg's papers is found at Stanford University.

Correspondence, notes, and manuscripts including items that relate to most of Agnew's professional activities, are especially rich in materials that deal with the treatment of eye diseases during the latter half of the 19th century. An interesting sidelight of the collection is a group of finely detailed woodblocks and steel plates that Agnew used to illustrate his published articles.

Manuscript materials which include correspondence, business papers, composition scrapbooks and musical scores; books; clippings; records; and photographs.

Dawn Powell (1896-1965) was an American author of novels, plays, and short stories. The collection includes address books, appointment books, books, clippings, correspondence, diaries, ephemera, family materials, manuscripts, notes, notebooks, photographs, programs, research files, reviews, scrapbooks, sketches and drawings.

This archive consists of manuscripts, business files, production materials, and correspondence from 1966 -2012. The journal Hanging Loose was first published in 1966 was preceded by the journal Things, begun by two Columbia College students Emmet Jarrett and Ron Schreiber, Hanging Loose Press founders. The most recent issue #101 was published in 2013. The press has also published books, mostly poetry. The selection process is collective and inclusive. Hanging Loose publishes high school students and has dedicated issues to literature written by prison inmates. HL published Hettie Jones, long-time Columbia-affiliated poet Paul Violi, Jack Agueros, Sherman Alexie, and Charles North, as well as many of the collective members. Denise Levertov is a former board member.

The collection contains correspondence with the authors, including contracts signed with authors as well as negotiations with the authors over various aspects of publishing their works; financial records documenting many aspects of the operation of Harper & Brothers, including royalties paid to authors, records of stock offerings and company reorganizations, and general ledgers which contain daily notes on all aspects of the operation of the business; book catalogues and trade lists; research materials collected by Eugene Exman for his history of Harper & Brothers; visual materials, from drawings and photographs of Harper's authors to colophon designs and an oil painting of the original Harper's building.

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.

Correspondence, manuscripts, lectures, notes, diaries, notebooks, reports, financial records, blueprints, photographs, and printed materials of Y.C. James Yen and the IIRR concerned with the development, sharing, and financing innovative methods of teaching, improving agriculture, health and family planning, and education in impoverished villages. Among the cataloged correspondents are: Pearl Buck, William O. Douglas, Nelson Rockefeller, and DeWitt Clinton.

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