26 letters written by or to the Ide and Sanford families, and typescripts of the letters; genealogical chart including family names Jenks, Ide, Sanford, Mowry, Angell, Willard, Browning, Arnold, Aldrich, Douglas, Harris, Hunt, Man, Milleman, Oakes, Randall, Sprague, Steere, and Wilbur; and two pages from Ide family Bible.

Letters of the collector's maternal ancestors, including members of the Alden, Day, Meloy, Perkins, Willard, and Williams families, many of whom migrated from New England to the Cooperstown and Chenango River areas of New York State; correspondence deals with personal and family matters.