| Letter, to the Rufus Anderson, from Tillman C. Trowbridge and Cyrus Hamlin | Amerikan Bord Heyeti (American Board) | 1859-09-18 |
| Letter, to the S.B. Treat, from Cyrus Hamlin (letter on physicians) | Amerikan Bord Heyeti (American Board) | 1863 |
| Letter, to the Rufus Anderson, from Harrison G.O. Dwight | Amerikan Bord Heyeti (American Board) | 1858-10-15 |
| Letter, to the Rufus Anderson, from Tillman C. Trowbridge | Amerikan Bord Heyeti (American Board) | 1861-07 |
| Letter, to the Rufus Anderson, from Tillman C. Trowbridge | Amerikan Bord Heyeti (American Board) | 1860-04-05 |
 | Letter, to Charles T. Riggs, from Charles K. Tracy | Amerikan Bord Heyeti (American Board) | 1912-07-26 |
 | Letter, to Charles T. Riggs, from W.S. Murray, American College for Girls at Constantinople | Amerikan Bord Heyeti (American Board) | 1912-05-04 |
 | Letter, to the Committee ad Interim, from Sophia S. Holt | Amerikan Bord Heyeti (American Board) | 1912-11-20 |
| Letter, to Theodore A. Baldwin, from Tillman C. Trowbridge | Amerikan Bord Heyeti (American Board) | 1878-03-05 |
| Letter, to Theodore A. Baldwin, from Alphaeus N. Andrus | Amerikan Bord Heyeti (American Board) | 1878-03-28 |
