 | Letter, to Charles T. Riggs, from Henry K. Wingate | Amerikan Bord Heyeti (American Board) | 1910-11-23 |
 | Letter, to Charles T. Riggs, from George E. White | Amerikan Bord Heyeti (American Board) | 1912-05-25 |
| Letter, to Secretary, American Tract Society, from Fred L. Kingsbury and Charles S. Dwight | Amerikan Bord Heyeti (American Board) | 1885 |
| Letter, to Charles T. Riggs, from Henry K. Wingate | Amerikan Bord Heyeti (American Board) | 1910-12-10 |
 | Letter, to Charles T. Riggs, from Theodore A.Elmer | Amerikan Bord Heyeti (American Board) | 1911-07-26 |
| Letter sent by [J.E. Pierce] from London to the American Board in Constantinople on his journey to Constantinople | Amerikan Bord Heyeti (American Board) | 1878-09-24 |
 | Letter, to Joseph K. Greene, from Lyndon S. Crawford | Amerikan Bord Heyeti (American Board) | 1910-05-28 |
| Letter, to William Goodell, from Henry Hill | Amerikan Bord Heyeti (American Board) | 1832-02-15 |
| Letter, to Charles T. Riggs, from Charlette R. Willard | Amerikan Bord Heyeti (American Board) | 1913-01-25 |
 | Letter, regarding application to the Committee ad Interim, to Tillman C. Trowbridge | Amerikan Bord Heyeti (American Board) | 1860 |
