| Letter, to London Tract Society, Secretary, from Ira F. Pettibone | Amerikan Bord Heyeti (American Board) | 1863 |
| Letter, to the American Tract Society, from Cyrus Hamlin | Amerikan Bord Heyeti (American Board) | 1862 |
| Letter, to American Tract Society, New York, from Sanford Richardson, Herman N. Barnum and Justin W. Parsons | Amerikan Bord Heyeti (American Board) | 1860-06-04 |
| Letter, to Elias Riggs and Constantinople Station, from S.M. Minasian | Amerikan Bord Heyeti (American Board) | 1869-03-30 |
| Letter, from George F. Herrick, an answer to the Council | Amerikan Bord Heyeti (American Board) | 1869-04-17 |
| Letter, to Elias Riggs, from Cyrus Hamlin, 1868, extract | Amerikan Bord Heyeti (American Board) | 1868 |
| Letter, to Elias Riggs, from William G. Schauffler | Amerikan Bord Heyeti (American Board) | 1868-07-22 |
| Letter, to Simon Eutujian, from Elias Riggs | Amerikan Bord Heyeti (American Board) | 1861-07-27 |
| Letter, to the Pera Church | Amerikan Bord Heyeti (American Board) | 1861-08-19 |
| Letter, to the Members of the Northern Armenian Mission Assembled in Kharpoot, from George C. Knapp | Amerikan Bord Heyeti (American Board) | 1860-05-22 |
