 | Letter, to Charles T. Riggs, from George E. White | Amerikan Bord Heyeti (American Board) | 1911-05-17 |
| Letter, to Charles T. Riggs, from H. T. Perry | Amerikan Bord Heyeti (American Board) | 1910-10-22 |
| Letter, to Charles T. Riggs, from Henry K. Wingate | Amerikan Bord Heyeti (American Board) | 1910-12-10 |
| Letter, to Charles T. Riggs, from Henry K. Wingate | Amerikan Bord Heyeti (American Board) | 1912-01-27 |
| Letter, to Charles T. Riggs, from Henry K. Wingate | Amerikan Bord Heyeti (American Board) | 1911-05-10 |
| Letter, to Charles T. Riggs, from Herbert M. Irwin | Amerikan Bord Heyeti (American Board) | 1912-07-27 |
| Letter, to Charles T. Riggs, from James P. McNaughton | Amerikan Bord Heyeti (American Board) | 1911-04-29 |
 | Letter, to Charles T. Riggs, from James P. McNaughton | Amerikan Bord Heyeti (American Board) | 1911-05-05 |
 | Letter, to Charles T. Riggs, from James R. Brewster | Amerikan Bord Heyeti (American Board) | 1913-03-07 |
| Letter, to Charles T. Riggs, from Mary C. Fowle | Amerikan Bord Heyeti (American Board) | 1911-08-23 |
 | Letter, to Charles T. Riggs, from Mrs.R. B. Cherrington | Amerikan Bord Heyeti (American Board) | 1911-08-08 |
| Letter, to Charles T. Riggs, from Ralph S. Harlow | Amerikan Bord Heyeti (American Board) | 1912-07-10 |
| Letter, to Ira F. Pettibone, from [Hagopos Djedjiniyan] | Amerikan Bord Heyeti (American Board) | 1884-05-19 |
| Letter, to Ira F. Pettibone, from Hagopos Djedjiniyan ? | Amerikan Bord Heyeti (American Board) | 1884-05-19 |
| Letter, to Joseph K. Greene, from Laura Farnham | Amerikan Bord Heyeti (American Board) | 1910-05-07 |
 | Letter, to Mabel E. Emerson, Boston (Mass.) | Amerikan Bord Heyeti (American Board) | 1936-02-06 |
| Letter, to Mabel E. Emerson, Boston (Mass.) | Amerikan Bord Heyeti (American Board) | 1936-04-10 |
| Letter, to Mabel E. Emerson, Boston (Mass.), from Luther R. Fowle | Amerikan Bord Heyeti (American Board) | 1936-03-28 |
| Letter, to Mabel E. Emerson, Boston (Mass.), from Luther R. Fowle | Amerikan Bord Heyeti (American Board) | 1936-03-14 |
| Letter, to Mabel E. Emerson, Boston (Mass.), from Luther R. Fowle, Treasurer | Amerikan Bord Heyeti (American Board) | 1936-03-12 |
