Are the pairs of acorns a clue to use binary on the border, or might it be a clue to use this page 2nd, like the fold-in with Zac's tools on page 41 makes a 3... use this page 3rd....

Also, notice that the artists used 2 initials on this page, and 3 initials on page 112. The top of that page has some similar stuff going on.