The collection consists primarily of correspondence, photographs, project records, architectural drawings, legal documents, periodicals, news clippings and exhibition materials. The material held in this collection relates to architectural projects for Edgar J. Kaufmann by Frank Lloyd Wright, and the bulk of the material relates to Kaufmann's home, Fallingwater, at Bear Run, Pennsylvania. The collection documents the professional and personal relationship between the Kaufmann family and Wright, from the 1930s until the years preceding Wright's death in 1959.

Correspondence between Michael Meredith Hare, architect, philosopher and author, Frank Lloyd Wright, and Taliesin Fellowship member, William Bye Fyfe, when Hare was an architecture student at Yale in 1933, concerning Hare's inquiry into a Fellowship at Taliesin and Wright's views on architectural education. Also includes a 1940 autobiographical sketch of Hare.

The material spans the years 1948 to 1958 and documents Paton Price's relationship with Frank Lloyd Wright through the course of planning the New Theater to be located in Hartford, CT. The collection consists of letters, telegrams, publicity material, photographs, and a perspective view of the Theater signed by Wright.

This collection contains materials related to a full range of Blake's personal, professional, and academic lives. The bulk of the collection dates from the 1980s through the early 2000s. His professional and faculty papers document many of his interests, and primarily include published and unpublished lectures and articles. Although Blake delivered his lectures at various architectural schools in the United States and abroad, the specific locations of the lectures are not usually recorded on the documents. In addition, many articles he wrote for publication appear as annotated typescripts. There are also significant papers related to publication of his memoir No Place Like Utopia (Knopf, 1993), including correspondence and some production records. Throughout the professional and faculty papers are also found a large number of reference files relating to modern architecture, art, design, urbanism, technology, and current events, compiled over many decades. The collection also contains correspondence with personal friends, clients, and professional and academic colleagues. There is an especially significant amount of correspondence and clippings related to Patwant Singh, a Sikh writer, commentator, journalist, editor, and publisher, with whom Blake was a close friend. There are also many materials including correspondence, typescripts, and book production records related to Philip Johnson and Paul Rudolph, with whom Blake was also close. Architectural project records include original and reprographic drawings and photographs for 40 residential and institutional designs, located primarily in New York City and the surrounding region. Of particular note are drawings and papers related to Blake's important Pin Wheel House (1954) in Water Mill, New York. In addition, there are drawings related to the American National Exhibition in Moscow (1959). Finally, there is a significant number of drawings, photographs, and correspondence related to the Benjamin Gerson Residence (1999-2003) in Johnsonburg, New Jersey, one of Blake's last architectural projects.