| Friendship Through Books Project | Amerikan Bord Heyeti (American Board) | 1956-03-01; 1962-09-01 |
| Letter, extracts of the S.B. Bergne's letter to B. Barker | Amerikan Bord Heyeti (American Board) | 1854-07-25 |
| Letter, miscellaneous correspondence regarding Ceylon, a key to India | Amerikan Bord Heyeti (American Board) | 1898 |
| Letter, to Charles T. Riggs, from A.T. Daghlian, Anatolia College | Amerikan Bord Heyeti (American Board) | 1912-01-20 |
| Letter, to Charles T. Riggs, from A.T. Daghlian, Anatolia College | Amerikan Bord Heyeti (American Board) | 1912-01-03 |
 | Letter, to Charles T. Riggs, from Arthur C. Ryan | Amerikan Bord Heyeti (American Board) | 1912-07-13 |
 | Letter, to Charles T. Riggs, from George E. White | Amerikan Bord Heyeti (American Board) | 1912-05-25 |
 | Letter, to Charles T. Riggs, from James R. Brewster | Amerikan Bord Heyeti (American Board) | 1913-05-08 |
| Letter, to Secretary, American Tract Society from L.yman Bartlett and Theodore A. Baldwin | Amerikan Bord Heyeti (American Board) | 1884 |
| Letter, to Secretary, American Tract Society, from Fred L. Kingsbury and Charles S. Dwight | Amerikan Bord Heyeti (American Board) | 1885 |
| Letter, to William Goodell, from Henry Hill | Amerikan Bord Heyeti (American Board) | 1835-06-06 |
| Letter, to William Goodell, from Henry Hill | Amerikan Bord Heyeti (American Board) | 1834-08-02 |
| Letter, to William Goodell, from Henry Hill | Amerikan Bord Heyeti (American Board) | 1844-09-28 |
| Letter, to William Goodell, from Henry Hill | Amerikan Bord Heyeti (American Board) | 1844-10-14 |
| Letter, to William Goodell, from Henry Hill | Amerikan Bord Heyeti (American Board) | 1842-09-29 |
| Letter, to William Goodell, from Henry Hill | Amerikan Bord Heyeti (American Board) | 1842-09-12 |
| Letter, to William Goodell, from Henry Hill | Amerikan Bord Heyeti (American Board) | 1831-12-16 |
| Letter, to William Goodell, from Henry Hill | Amerikan Bord Heyeti (American Board) | 1833-12-04 |
| Letter, to William Goodell, from Henry Hill | Amerikan Bord Heyeti (American Board) | 1842-08-13 |
| Letter, to William Goodell, from Henry Hill | Amerikan Bord Heyeti (American Board) | 1832-06-19 |
