This is the third clue given for this fourth section. In 2010, Sanborn released the first clue for solving these 97 letters. It was the word BERLIN which is to be found in positions 64 through 69 (NYPVTT).
The code remained unsolved.
Sanborn then released another clue in 2014. The word CLOCK is to be found in the positions following BERLIN (70 through 74)(MZFPK). This sent many to researching the famous Berlin Clock and how it might relate or help solve this last part.
And now in 2020, Sanborn releases a third clue. The word NORTHEAST is to be found in the positions 26 through 34 (QQPRNGKSS)