Update 12/26/21 - I moved the final. If you solved this puzzle before 12/26/21 you will need to rerun Certitude.
Our son's family moved to Ashley in August 2021. Since I plan to visit them regularly I can now place caches here. This cache is not at the posted coordinates. Solve the puzzle, find the cache. Thanks to Goldfinch for his help placing this geo art.
What is the last name of Ashley's first postmaster? Use Certitude to get final coordinates and hint.

You can validate your puzzle solution with certitude.