| Results | ||||
| Note: A ? indicates the information presented is a 'best guess'. The information on the original letter is unknown or illegible and may not be completely accurate. | ||||
| Box: Folder | Letter Date | Written By | Written To | |
| 5:13 | 1973 February 11 | Robert E. Graham | Henry Bragdon | Details |
| 5:13 | 1973 March 05 | Robert E. Graham | Henry Bragdon | Details |
| 5:16 | 1976 February 24 | Robert E. Graham | Henry Bragdon | Details |
| 5:16 | 1976 May 10 | Robert E. Graham | Henry Bragdon | Details |
