The August 1942 letters are transcribed.
In late July, Walt started using a code to send Ruth little secret messages, sometimes on the envelopes, sometimes in the letters. I don’t know if it is some kind of childhood code they both might have been familiar with, or even which one of them started it. Anyway, if you are keen to use it yourself, here is my rendering of the key:
The dots above each segment of the key, one for the first half of the alphabet and two for the second half, should be placed in the portion of each grid you use to represent a letter to indicate which part of the key to choose from in your translation of the message. So a B would look like this: |・| Not to be confused with an O: |・・|