Came across this uphill from the spring of the previous post. Someone collected all the downed trunks of cedar trees, collected them, then leaned them all up against the stone wall so as to touch the largest of a few remaining cedar trees in the area. Kind-a looks ceremonial. In other words not obviously practical.
Still higher on the hill was a stone seat built on top of the ledge:
This detail of the back shows deliberate work:
The opening faces approximately magnetic south.