The papers consist of correspondence, writings, photographs, research files, printed material, and miscellanea of George Dudley Seymour, a lawyer, antiquarian, historian, author and city planner in New Haven, Connecticut. Seymour's personal papers and collected manuscripts document the history of the Seymour family, the patriot Nathan Hale, the city planning movement in New Haven, Connecticut, and local history, 1684-1944. General correspondence files contain the bulk of personal correspondence, with many figures from the fields of art, education, politics, and sculpture represented, including William Howard Taft, a close friend of Seymour's. Family genealogy files include extensive correspondence, papers, and photographs Seymour accumulated in the course of his research on The Seymour Family (1939). Seymour also collected information and manuscripts relating to Nathan Hale, the Connecticut hero.