Start at the pine furthest to the left!

Agree with previous comments—bummer to have to pull down part of the wall.

Went to where the box should be and there's a ton of rocks that have fallen out of the wall :( poked around in the rubble a bit but no box - didn't want to pull out more wall and potentially completely destroy it.

Your clues were great and the bench perfect for a stamp-in. But I was dismayed to see that I would have to vandalize that nicely built stone wall to get the box. I did anyway, and tried my best to fit the stones back in. A box should never be hidden inside a stone wall because its section will eventually become destroyed. I hope you will move your box somewhere else, such as at the base of the wall, perhaps behind the mentioned pine. Then replace all the stones so no one would ever know they were once out of place.