Additional Elijah Boardman may be found at other institutions:
The New Haven Colony Historical Society in the Whitney Library, New Haven, Connecticut, holds a collection of Boardman family papers, 1803-1862.
The Western Reserve Historical Society, Cleveland, Ohio, holds related items in the Ephraim Root papers, 1762-1825, and in the Wadsworth family papers, 1792-1868.
The Yale University Libraries, Manuscripts and Archives, New Haven, Connecticut, has a collection of Boardman family papers, 1770-1917.
