Cache is not located at posted coordinates.
You will need a permanent marker to sign log.
I recently visited the Coumeenoole Ogham Stone on the Dunmore headland, very near the western tip of the Dingle Peninsula, County Kerry, Ireland.
N52 06.617, W10 28.388
328 feet above the Atlantic Ocean.
It has been dated to the early centuries A.D..
There are curious marks on the stone and with a little research I was able to decipher them.
Looking at the stone closer I found that there was another set of marks on the back edges of the stone.
This newly discovered set led me somewhere else.
Here is what I found: See photos.
You can validate your puzzle solution with certitude.
FTF HONORS GO TO TFulton42 !!!