| Circular letter, Circular from Herman N. Barnum, Secretary, Harpoot Station | Amerikan Bord Heyeti (American Board) | 1859-07-28 |
| Circular letter, from Tillman C. Trowbridge, on behalf of the Committee ad Interim | Amerikan Bord Heyeti (American Board) | 1859-08-28 |
| Circular letter, to the stations, from E. Riggs | Amerikan Bord Heyeti (American Board) | 1855-02-20 |
| Circular letter, from Missionary House, Boston to Northern Armenian Mission, by Rufus Anderson | Amerikan Bord Heyeti (American Board) | 1859-11-08 |
| Circular letter, Dr. Hamlin's circular containing substance of his letter to Dr. Anderson | Amerikan Bord Heyeti (American Board) | 1858-01-10 |
| Circular letter, The seventh circular to the friends of the Pilgrim-Mission | Amerikan Bord Heyeti (American Board) | 1855-12 |
| Circular periodical, to the Armenian Mission, from Missionary House, James M. Gordon | Amerikan Bord Heyeti (American Board) | 1855-03-15 |
| Circular letter, on Dr. Jewett's removal to Cesarea | Amerikan Bord Heyeti (American Board) | 1855 |
