Dorothy Haon (1898-1995) attended the New York School of Fine and Applied Art (later, Parsons School of Design) in 1923-1924, and went on to careers in fashion design and merchandising. The collection, which spans the late 1930s through the 1950s, includes working sketches and notes, cloth patterns, fabric samples, and business records. Also included is work by Dorothy's sister, Marion Haon.

The collection consists of eight notebooks kept by Mariette Cassels (1905-1993) while studying in the Paris Ateliers of the New York School of Fine and Applied Art (now, Parsons The New School for Design) in 1930-1931. Includes lecture notes, photographs, postcards, clippings and sketches of furniture and decorative moldings.