National Park Service Public Consultation on Chesapeake and Ohio Canal National Historical Park, 1972

The collection includes Hahn's early correspondence as society president, records of advocacy with the National Park Service, flyers advertising canal publications, brochures for different canals, and documents relating to canal research as well as selected news clippings. A few whole and partial issues of the newsletter "Along the Towpath" are also included. There is also some graphical material depicting canals, canal boats, and structures, primarily in the form of prints.