| Istanbul (1944-1946) | Amerikan Bord Heyeti (American Board) | 1944-05-03; 1946 |
| Letter to Pettibone | Amerikan Bord Heyeti (American Board) | 1869-08-04 |
| Letter to the Protestant Armenian Church, from Tillman C. Trowbridge, William G. Schauffler, Theodore A. Baldwin | Amerikan Bord Heyeti (American Board) | 1868-05-26 |
| Letter, from Edward M. Dodd (Mr. Parson's going to America) | Amerikan Bord Heyeti (American Board) | 1858-06-24 |
| Letter, from Jennie H. Perry | Amerikan Bord Heyeti (American Board) | 1878-02-15 |
 | Letter, from Justin W. Parsons | Amerikan Bord Heyeti (American Board) | 1862 |
 | Letter, from the yezidi chief M. Belloo, translation of a second letter, | Amerikan Bord Heyeti (American Board) | - |
| Letter, miscellaneous correspondence regarding Ceylon, a key to India | Amerikan Bord Heyeti (American Board) | 1898 |
| Letter, to Bro. Lavkin (?) | Amerikan Bord Heyeti (American Board) | 1896-08-03 |
| Letter, to Charles A.S. Dwight, from J.H. Kandijian | Amerikan Bord Heyeti (American Board) | 1889-05-04; 1889-05-16 |
| Letter, to Charles T. Riggs, from Arthur C. Ryan | Amerikan Bord Heyeti (American Board) | 1911-04-15 |
 | Letter, to Charles T. Riggs, from Enoch F. Bell | Amerikan Bord Heyeti (American Board) | 1911-03-28 |
 | Letter, to Charles T. Riggs, from Ernest C. Pye | Amerikan Bord Heyeti (American Board) | 1911-07-01 |
| Letter, to Charles T. Riggs, from Robert Chambers | Amerikan Bord Heyeti (American Board) | 1913-04-04 |
 | Letter, to Committee ad Interim, from Reshad Seid | Amerikan Bord Heyeti (American Board) | 1913-04-24 |
| Letter, to Joseph K. Greene, from Laura Farnham | Amerikan Bord Heyeti (American Board) | 1910-05-07 |
 | Letter, to Mabel E. Emerson, Boston (Mass.) | Amerikan Bord Heyeti (American Board) | 1936-02-06 |
| Letter, to Mabel E. Emerson, Boston (Mass.) | Amerikan Bord Heyeti (American Board) | 1936-04-10 |
| Letter, to Mabel E. Emerson, Boston (Mass.), from Luther R. Fowle | Amerikan Bord Heyeti (American Board) | 1936-03-28 |
| Letter, to Mabel E. Emerson, Boston (Mass.), from Luther R. Fowle | Amerikan Bord Heyeti (American Board) | 1936-03-14 |
