| Letter, to Harrison G.O. Dwight, to Benjamin Parsons | Amerikan Bord Heyeti (American Board) | 1857-04-14 |
| Letter, to the Committee ad Interim, from Charles F. Morse | Amerikan Bord Heyeti (American Board) | 1857-08-26 |
| Letter, to Tillman C. Trowbridge, from Fayette Jewett | Amerikan Bord Heyeti (American Board) | 1857-09-22 |
| Letter, from W. Clark | Amerikan Bord Heyeti (American Board) | 1857-02-09 |
| Letter, from the Rodosto church to the mission, to the Council of Rev. Missionaries, to Mr. Peabody, Constantinople | Amerikan Bord Heyeti (American Board) | 1857-05-15 |
| Letter, from Tocat Station, Henry J. Van Lennep, Alexander R. Plumer | Amerikan Bord Heyeti (American Board) | 1857 |
| Letter, to Harrison G.O. Dwight, from Tillman C. Trowbridge | Amerikan Bord Heyeti (American Board) | 1857-02-21 |
| Letter, to the Committe ad Interim, from Dr. Pratt | Amerikan Bord Heyeti (American Board) | 1857-01-06 |
| Letter, to the Constantinople Mission of the American Board Heyeti, from J. P. Durbin | Amerikan Bord Heyeti (American Board) | 1857-07-20 |
| Letter, to Wilson A. Farnsworth, from Harrison G.O. Dwight | Amerikan Bord Heyeti (American Board) | 1857-03-02 |
