Nearby were a fire pit with some charred wood and a sort of wood-drying rack shown here. Sticks were leaning against each other along a post slanted against a tree. It looked like a small hut, but we think from its location that it was a firewood supply. There were absolutely no signs of anyone having been there recently except the charred wood.
We were convinced we had seen another hut through the woods a short distance away, so we walked over there after a while. It turned out to be the branches of an enormous felled tree that were shaped like a teepee when viewed head on from the gully we had walked in. On the right and bottom I sketched the walk that we made to get home, down the ridge, through some brambles, and alongside the chimney to the trail.