The papers of New York museum director and independent curator Thomas M. Messer measure 4.6 linear feet and date from 1949-2010. Material includes correspondence, a diary transcript, and printed material that reflect Messer's long career, primarily as director of the Solomon R. Guggenheim Foundation. Correspondence comprises the bulk of the collection and documents the relationships he built with artists, art historians, curators, and others colleagues. Notable correspondents include Francis Bacon, Will Barnet, Larry Bell, Alberto Burri, Pol Bury, Marc Chagall, Chryssa, Jean Dubuffet, Max Ernst, Dan Flavin, Helen Frankenthaler, Alberto Giacometti, Richard Hamilton, Jean Hélion, Grace Knowlton, Rosemarie Koczy, Jirí Kolár, Katharine Kuh, Agnes Martin, Henry Moore, George Rickey, Charles Simonds, Clyfford Still, Jack Tworkov, and many others.

The papers of art critic Emily Genauer measure 10.1 linear feet and date from circa 1920 to 1990. Found within the papers are correspondence with artists, gallery owners, and friends; extensive writings; research and reference files; personal business records; and photographs. Notable correspondents include David Aronson, Mrs. Max Beckman, Isabel Bishop, Dorothy Carnegie, Marc Chagall, Salvatore Dali, Stuart Davis, Martha Graham, Harry F. Guggenheim, Irene Rice Pereira, Clyfford Still, Rufino Tamayo, and Frank Lloyd Wright, among many others.

The papers of New York accountant and art collector Bernard J. Reis measure 2.1 linear feet and date from circa 1913 to 1983. The papers document his friendships with artists, his role as accountant for Art of This Century and the Peggy Guggenheim Foundation, and executor of the Mark Rothko Estate. Included are biographical and family papers, correspondence, professional files, scrapbooks, printed material, and photographs.

The Peppino Mangravite papers measure 6.2 linear feet and are dated 1918-1982. They consist of correspondence, subject files, recorded interviews with significant artists and transcripts, writings and notes, miscellaneous records, printed matter, and photographs documenting Mangravite's career as a painter and educator.

The papers of artist, collector, librarian, and scholar Kate Steinitz measure 4.3 linear feet and date from circa 1910 to 2002. The collection documents Steinitz's life and career in Germany and the United States through biographical material; correspondence; writings, including manuscripts and travel diaries; exhibition files; personal business records; printed material; travel scrapbooks; artwork; and photographs.

The papers of art historian, dealer, critic, and curator Katharine Kuh measure 12.1 linear feet and date from 1875-1994, with the bulk of the material dating from 1930-1994. The collection documents Kuh's career as a pioneer modernist art historian and as the first woman curator of European Art and Sculpture at the Art Institute of Chicago. Found within the papers are biographical material; correspondence with family, friends and colleagues; personal business records; artwork by various artists; a travel journal; writings by Kuh and others; scrapbooks; printed material; photographs of Kuh and others; and audio recordings of Kuh's lectures and of Daniel Catton Rich reading poetry.

The Walter Rosenblum Collection is comprised of 7,396 silver gelatin negatives taken by noted photographer Walter Rosenblum (1919-2006) for New York art galleries, collectors and artists between 1945 and 1976. The collection reflects the art of his time and is particularly strong in American and European avant-garde, surreal and abstract works.

The records of the Los Angeles Stendahl Art Galleries measure 7.5 linear feet and date from 1907 to 1971. The collection is comprised of administrative and financial files, correspondence, exhibition files, and subject files on numerous artists, organizations, and other art-related topics. There is one scrapbook of clippings on the artist Edgar Payne.

The papers of realist painter Raphael Soyer date from 1933 to 1989 and measure 3.9 linear feet. They document Soyer's career as a painter, printmaker, and writer. Found within the papers are scattered biographical materials, including several transcripts of interviews with Soyer; extensive personal and professional correspondence; writings and notes by Soyer and others; scattered legal and financial records; exhibition materials, clippings and other printed material; and photographs of Soyer in his studio, with artists and friends, and at art events. Also found are one sketch and a facsimile of Soyer's 1968 sketchbook produced by Forum Gallery.

The papers of New York City art critic, writer, and lecturer Forbes Watson date from 1840-1967 with the bulk of materials dating from 1900-1960 and measure 13.9 linear feet. Found are biographical materials, correspondence, business records relating to the Arts Publishing Corporation, records documenting Watson's work for the Public Works of Art Project and the Section of Painting and Sculpture, reference files, an exhibition file from the Pepsi-Cola Company's Third Annual Exhibition, writings and notes, ten scrapbooks and loose pages, printed materials, and photographs.