| 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 | |
| 5:15 | 1974 November 13 | David A. Siegfried | Henry Bragdon | Details |
| 5:16 | 1975 January 24 | David A. Siegfried | Henry Bragdon | Details |
| 5:16 | 1975 April 07 | David A. Siegfried | Henry Bragdon | Details |
| 5:16 | 1976 July 23 | David A. Siegfried | Henry Bragdon | Details |
