True solution to parchment.png and followthetrail.txt

8709131948

Tridigit decoder:
6508132947
abcdefghi-
jklmnopqr-
stuvwxyz--

Ciphertext:
671117512411412

a e e e b e g i e e i e g
j n n n k n p r n n r n p
s w w w t w y   w w   w y
-------------------------
a n e w b e g i n n i n g

Plaintext:
anewbeginning.txt