I have added as a separate page above the encoding/decoding method of the VMs.
A number of people expressed difficulty understanding it, so I have laid it out in as simple and direct a fashion as I can.
Noting continued difficulty, I have modified both pages to add information that will hopefully be useful in understanding.
I realized I used an older version of the method, so updated the page and added a file showing the encoding and decoding of the word THE in the text of f68r1.
Comments and questions welcome.