| Letter to George Washburn | Amerikan Bord Heyeti (American Board) | 1859-03-05 |
| Letter to George Washburn | Amerikan Bord Heyeti (American Board) | 1864-11-05 |
| Letter to George Washburn | Amerikan Bord Heyeti (American Board) | 1859-03-02 |
| Letter to Pettibone | Amerikan Bord Heyeti (American Board) | 1869-08-04 |
| Letter to Rev. E. M. Dodd | Amerikan Bord Heyeti (American Board) | 1864-03-19 |
| Letters Packet 1 | Amerikan Bord Heyeti (American Board) | 1858-11-29; 1860-05-25 |
| Letters Packet 2 - Sermons of Elias Riggs | Amerikan Bord Heyeti (American Board) | 1890-02-18; 1895-06-27 |
| Letters Packet 3: Goodell Correspondence | Amerikan Bord Heyeti (American Board) | 1843; 1869 |
| Letters Packet 4 | Amerikan Bord Heyeti (American Board) | 1859; 1886 |
| Letters Packet 5: Emma's death | Amerikan Bord Heyeti (American Board) | 1862; 1863 |
| Letters Packet 6: Samuel's death | Amerikan Bord Heyeti (American Board) | 1843; 1845 |
| Letters Packet 7 (a): Edward & Elias's deaths | Amerikan Bord Heyeti (American Board) | 1869; 1913 |
| Letters Packet 7 (b): Martha's correspondence to Elias | Amerikan Bord Heyeti (American Board) | 1868; 1873 |
| Letters Packet 7 (c) | Amerikan Bord Heyeti (American Board) | 1868; 1913 |
| Letters Packet 7 (d) | Amerikan Bord Heyeti (American Board) | 1868; 1877 |
| Letters Packet 8 (a) | Amerikan Bord Heyeti (American Board) | 1859; 1863 |
| Letters Packet 8 (b) | Amerikan Bord Heyeti (American Board) | 1839; 1846 |
| Letters to William W. Peet on the matter of taxation, 1914 | Amerikan Bord Heyeti (American Board) | 1914-10-05; 1914-10-14 |
| Marsovan Report, 1880 | Amerikan Bord Heyeti (American Board) | 1880 |
| Marsovan Report, 1883-1884 | Amerikan Bord Heyeti (American Board) | 1883; 1884 |