| 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 17 | Nathan Kroll | Carman Barnes | |
| 1938 September 08 | Nathan Kroll | Carman Barnes | |
| 1939 January 01? | Nathan Kroll | Carman Barnes | |
| 1939 July 06 | Nathan Kroll | Carman Barnes | |
| 1939 December 01? | Nathan Kroll | Carman Barnes | |
| 1940 January 01? | Nathan and Lucy Kroll | Carman Barnes | |
| 1940 February 13 | Nathan Kroll | Carman Barnes | |
| 1940 February 21 | Nathan Kroll | Carman Barnes | |
| 1940 March 12 | Nathan Kroll | Carman Barnes | |
| 1940 April 11 | Nathan Kroll | Carman Barnes | |
| 1940 June 22 | Nathan Kroll | Carman Barnes | |
| 1940 June 29 | Nathan Kroll | Carman Barnes | |
| 1940 June 03 | Nathan Kroll | Carman Barnes | |
| 1940 July 29 | Nathan Kroll | Carman Barnes | |
| 1941 January 01? | Nathan Kroll | Carman Barnes | |
| 1941 February 13 | Nathan Kroll | Carman Barnes | |
| 1941 July 10 | Nathan Kroll | Carman Barnes | |
| 1949 May 01? | Nathan and Lucy Kroll | Carman Barnes | |
| Unknown | Nathan Kroll | Carman Barnes | |
| Unknown | Nathan Kroll | Carman Barnes | |
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