| Letter, to Tillman C. Trowbridge, from Henry S. West, Oliver W. Winchester | Amerikan Bord Heyeti (American Board) | 1865-06-05 |
| Letter, to the Members of the Constantinople Station, from Henry A. Schauffler | Amerikan Bord Heyeti (American Board) | 1865-03-24 |
| Letter, to Tillman C. Trowbridge, from Theodore L. Byington | Amerikan Bord Heyeti (American Board) | 1865-05-13 |
 | Letter, to Tillman C. Trowbridge, from Theodore L. Byington | Amerikan Bord Heyeti (American Board) | 1865-03-29 |
| Letter, to Tillman C. Trowbridge, from Crosby H. Wheeler | Amerikan Bord Heyeti (American Board) | 1865-04-15 |
| Letter, to Tillman C. Trowbridge, from Henry C. Haskell | Amerikan Bord Heyeti (American Board) | 1865-07-21 |
| Letter, to the Committee ad Interim, from Daniel Ladd | Amerikan Bord Heyeti (American Board) | 1866-03-10 |
| Letter, to Tillman C. Trowbridge, from Daniel Ladd | Amerikan Bord Heyeti (American Board) | 1865-03-04 |
| Letter, to Tillman C. Trowbridge, from George C. Knapp | Amerikan Bord Heyeti (American Board) | 1865-03-21 |
| Letter, to Joseph K. Greene, from Henry K. Wingate | Amerikan Bord Heyeti (American Board) | 1909-12-03 |
