| Letter, to native pastors, from E. Riggs and Edwin E. Bliss | Amerikan Bord Heyeti (American Board) | 1853-06-10 |
| Letter, to Harrison G.O. Dwight, from Benjamin Barker | Amerikan Bord Heyeti (American Board) | 1854-08-24 |
| Letter, to Josiah Peabody, from Harrison G.O. Dwight | Amerikan Bord Heyeti (American Board) | 1854-06-10 |
| Letter, to E. Riggs, from J. Pratt, Aintab Station | Amerikan Bord Heyeti (American Board) | 1855-01-17 |
| Letter, to Edwin E. Riggs, from Benjamin Barker | Amerikan Bord Heyeti (American Board) | 1854-09-07 |
| Letter, to Harrison G.O. Dwight | Amerikan Bord Heyeti (American Board) | 1845-05-16 |
| Letter, to the American Mission at Constantinople, S.B. Marsonkian | Amerikan Bord Heyeti (American Board) | 1912-08-08 |
| Letter, to Charles T. Riggs, from Laura Farnham | Amerikan Bord Heyeti (American Board) | 1912-05-13 |
| Letter, to Henry O. Dwight and Theodore A. Baldwin, from Tillman C. Trowbridge | Amerikan Bord Heyeti (American Board) | 1877-07-04 |
| Letter, to Theodore A. Baldwin, from Tillman C. Trowbridge | Amerikan Bord Heyeti (American Board) | 1877-06-12 |
