Correspondence, scripts, business papers, original artwork, and production stills related to videos. Twenty completed video works, nearly half of which are out of distribution, 51 hours of video documentation including "Behind the Scenes," a 19-hour documentary of the production process for two key works: A MOSQUE IN TIME and MEMORY OF FIRE, and a 32-hour documentary of Japanese Butoh dance, and last, video copies of television interviews with Vélez for Spanish, Argentinian, and Japanese television.

The Kemi Nakabayashi Collection includes a number of animated sound books from Japan, most likely created in the early years of the Second World War, before economic and cultural restrictions would have made such publications impossible. All books include an embossed audio disc on the front cover. A small hole through the center of the book allows for it to be placed on a traditional turntable and the front cover played back. A later sound book can also be found in the collection from 1960, which includes a number of sound sheets of traditional Japanese folk songs, with accompanying lyrics and historical description. Also included in this collection are a number of orginial lyric sheets which accompanied 78 rpm discs recordings released in Japan. Notable labels include Angel, Columbia, King, Nipponophone, Polydor, Taihei, Teichiku, Tokyo, Tsuru, and Victor.

Original bridge plans and construction drafts. Four different bridge types are represented: Strauss direct lift bridge, Strauss trunnion draw span, Strauss trunnion bascule bridge, and Strauss vertical lift bridge.