Dorn Charles McGrath was the chair and Emeritus Professor of Geography and Urban and Regional Planning. He is also the Director of the Institute for Urban Development Research at The George Washington University (GW). Collection consists of the Machu Picchu project files, correspondence, articles, and personal chronicles. The materials range between 1973 and 1987. The subjects represented are about Machu Picchu and the surrounding areas.

Materials in this collection include research papers, news clippings, research reports, newsletters, government documents, research notes, memos, bibliographic cards, correspondence, maps, photographs, slides, negatives, audiotapes, videotapes, and artifacts. They range in date from 1965-90.