I told John about Elpam's translation, and John was able to fill in some more of the blanks for me. I need to get this new information Jack and see what else he knows...
After showing John the Coded Communique that Jack gave me, John used a Hyper Glyph to try to decipher the symbols... to no avail. While John attempts to fix and recalibrate the Hyper Glyphs to work on these symbols, he asked me to show the letter around to the other experts in town. Maybe they can shine some light on all this...