Charles E. Frye is a geographer, cartographer, information scientist, and U.S. Army veteran. His interests include genealogy, the history of the American Revolutionary War, and major league baseball. As he learned of Isaac Frye’s story, he applied his skills to design an approach to use geographic information systems (GIS) to organize and document historical research projects. This GIS data also appears in Florentine Films' "The American Revolution," a six-episode documentary by Ken Burns, Sarah Botstein, and David Schmidt. Using GIS to organize Isaac Frye’s story yielded a wealth of information that led to the Duty in the Call of Liberty series. Today, he lives and works in Southern California.