| Letter, Charlotte Willard, William W. Peet, Letters about girls' school opening | Amerikan Bord Heyeti (American Board) | 1924-08-09 |
| Letter, to Tillman C. Trowbridge, from Henry C. Haskell, Tabular view of Philippopolis Station | Amerikan Bord Heyeti (American Board) | 1865-01-07 |
| Letter, Christian Workers' Union correspondence | Amerikan Bord Heyeti (American Board) | 1922; 1924 |
 | Letter, Charles C. Tracy, William W. Peet, correspondence about property matters | Amerikan Bord Heyeti (American Board) | 1910-01 |
 | Letter, to United States Legation regarding protection of American citizens | Amerikan Bord Heyeti (American Board) | 1918-10 |
| Letter, to Edward M. Dodd, from Tillman C. Trowbridge | Amerikan Bord Heyeti (American Board) | 1865-01-10 |
| Letter, to Charles F. Morse, from Tillman C. Trowbridge | Amerikan Bord Heyeti (American Board) | 1865-01-23 |
| Letter, from Joseph K. Greene | Amerikan Bord Heyeti (American Board) | 1865-02-25 |
 | List, YMCA staff | Amerikan Bord Heyeti (American Board) | 1927 |
| Letter, to Secretary of American Tract Society, Boston, from L. Richardson, Charles F. Morse and Edwin E. Bliss | Amerikan Bord Heyeti (American Board) | 1867-05 |
