| Letter, to Tillman C. Trowbridge, from Benjamin Parsons | Amerikan Bord Heyeti (American Board) | 1858-01-26 |
| Letter, to Tillman C. Trowbridge, from Crosby H. Wheeler | Amerikan Bord Heyeti (American Board) | 1858-01-09 |
| Letter, to Harrison G.O. Dwight, from Oliver W. Winchester | Amerikan Bord Heyeti (American Board) | 1858-12-20 |
| Letter, to Harrison G.O. Dwight, from Jasper N. Ball | Amerikan Bord Heyeti (American Board) | 1858-12-02 |
| Letter, to Tillman C. Trowbridge, from Jackson G. Coffing | Amerikan Bord Heyeti (American Board) | 1858-03-11 |
| Letter, to the Constantinople Station, from Justin W. Parsons | Amerikan Bord Heyeti (American Board) | 1858-01-10 |
| Letter, to Tillman C. Trowbridge, from Andrew T. Pratt | Amerikan Bord Heyeti (American Board) | 1858-02-25 |
| Letter, to Tillman C. Trowbridge, from Andrew T. Pratt | Amerikan Bord Heyeti (American Board) | 1858-04-22 |
| Letter, to Harrison G.O. Dwight, from S.B. Bergne of the British and Foreign Bible Society | Amerikan Bord Heyeti (American Board) | 1858-07-22 |
| Letter, to the Yozgat Station, from Harrison G.O. Dwight (Mr. Van Lennep's location) | Amerikan Bord Heyeti (American Board) | 1858-09-07 |
