Collection includes the official records of the Conservancy, an historic structure report prepared for the Conservancy, and Graycliff-related historical artifacts and documents collected by the Conservancy.

Collection contains architectural drawings from the Historic American Buildings Survey of the Darwin D. Martin House, Buffalo, New York, designed by Frank Lloyd Wright and built in 1904.

Papers of J.J. Polivka, internationally renowned Czechoslovakian structural engineer. Collection documents his collaboration with Frank Lloyd Wright on many of Wright's later projects including the Guggenheim Museum, and the proposed Butterfly Bridge. Collection consists of correspondence, clippings, drawings, publications, photographs and photograph negatives.