| 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. | |||
| Letter Number | Letter Date | Written By | Written To |
| 1936 March 23 | Carman Barnes | Nathan Kroll | |
| 1940 January 25 | Carman Barnes | Nathan Kroll | |
| 1941 February 15 | Carman Barnes | Nathan Kroll | |
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