Lyman Martin (1908-2003) graduated from Parsons School of Design in 1939 and joined Thedlow, an interior decoration firm. At Thedlow, Martin created interiors and watercolor renderings, and designed rugs and murals. In 1969, Martin became president of Thedlow, remaining until its closure in 1979. The collection includes student work, interior drawings, a travel diary, floorplans, photographs, clippings, and exhibition files.

The collection is comprised of Marty Spiegel's student work for Parsons' Environmental Design Department, which he attended from 1973 to 1976. Consists of course materials, correspondence, drawings and sketches, and printed materials, as well as digital reproductions of 35mm slides of Spiegel's work.