| Letter, to the Constantinople Station, from Cyrus Hamlin | Amerikan Bord Heyeti (American Board) | 1862 |
| Letter, to R. Anderson, from William H. Seward | Amerikan Bord Heyeti (American Board) | 1862-08-25 |
 | Letter, to Charles T. Riggs, from Henry K. Wingate | Amerikan Bord Heyeti (American Board) | 1910-12-20 |
 | Letter, to Charles T. Riggs, from Xenephon P. Moschov | Amerikan Bord Heyeti (American Board) | 1910-11-02 |
 | Letter, to Charles T. Riggs, from S. Ralph Harlow | Amerikan Bord Heyeti (American Board) | 1911-02-07 |
| Letter, to Charles T. Riggs, from Henry K. Wingate | Amerikan Bord Heyeti (American Board) | 1910-11-14 |
| Letter, to Theodore A. Baldwin, from John F. Smith | Amerikan Bord Heyeti (American Board) | 1877-03-24 |
| Letter, to Theodore A. Baldwin, from William E. Locke | Amerikan Bord Heyeti (American Board) | 1877-04-21 |
| Letter, to Theodore A. Baldwin, from Moses P. Parmelee | Amerikan Bord Heyeti (American Board) | 1877-04-12 |
| Letter, to Theodore A. Baldwin, from George C. Raynolds | Amerikan Bord Heyeti (American Board) | 1877-04-23 |
