 | Letter, to Charles T. Riggs, from Ernest Pye | Amerikan Bord Heyeti (American Board) | 1913-03-01 |
 | Letter, to Charles T. Riggs, from Ernest Pye | Amerikan Bord Heyeti (American Board) | 1913-01-30 |
 | Letter, to Charles T. Riggs, from Esther B. Robbins White | Amerikan Bord Heyeti (American Board) | 1911-05-17 |
 | Letter, to Charles T. Riggs, from F. M. Stead | Amerikan Bord Heyeti (American Board) | 1912-12-19 |
 | Letter, to Charles T. Riggs, from F.M. Stead | Amerikan Bord Heyeti (American Board) | 1911-05-29 |
 | Letter, to Charles T. Riggs, from Fred F. Goodsell | Amerikan Bord Heyeti (American Board) | 1912-03-30 |
 | Letter, to Charles T. Riggs, from George E. White | Amerikan Bord Heyeti (American Board) | 1911-05-17 |
 | Letter, to Charles T. Riggs, from H.S. Alexacian | Amerikan Bord Heyeti (American Board) | 1911-06-26 |
 | Letter, to Charles T. Riggs, from Henry K. Wingate | Amerikan Bord Heyeti (American Board) | 1911-04-08 |
| Letter, to Charles T. Riggs, from Henry K. Wingate | Amerikan Bord Heyeti (American Board) | 1911-04-03 |
| Letter, to Charles T. Riggs, from Herbert M. Irwin | Amerikan Bord Heyeti (American Board) | 1913-02-28 |
| Letter, to Charles T. Riggs, from Herbert M. Irwin | Amerikan Bord Heyeti (American Board) | 1912-07-27 |
 | Letter, to Charles T. Riggs, from J.K. Marden, Anatolia Hospital | Amerikan Bord Heyeti (American Board) | 1911-11-22 |
| 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) | 1913-02-26 |
 | Letter, to Charles T. Riggs, from James R. Brewster | Amerikan Bord Heyeti (American Board) | 1913-03-07 |
 | Letter, to Charles T. Riggs, from James R. Brewster | Amerikan Bord Heyeti (American Board) | 1913-05-08 |
 | Letter, to Charles T. Riggs, from Kevork Derijian | Amerikan Bord Heyeti (American Board) | 1911-06-28 |
 | Letter, to Charles T. Riggs, from Lawson P. Chambers | Amerikan Bord Heyeti (American Board) | 1911-05-16 |
 | Letter, to Charles T. Riggs, from Lyndon S. Crawford | Amerikan Bord Heyeti (American Board) | 1912-01-24 |
