[From reader James O:]
After walking along them for my whole life, I began studying rock walls in earnest a few years ago. ...
Today I decided to poke around Estabrook to prepare for a trip with some students (I teach at Concord-Carlisle) and thought I would take some time to look for rocks as well. I think I approached the topic with an appropriate skepticism, but after today my interest has been piqued.
I walked up Hubbard's Hill and was immediately struck by the resemblance of this large rock to a snapping turtle head. To my amazement, the tip of the "nose" was pointed directly north. 
I later found the stone chamber. After noticing that the top of the hill seemed south-ish from the chamber, I took out my compass and walked as straight a line as I could due south. As it turned out, the turtle was pointing directly at the chamber. 
I didn't see any mention of this on the rockpiles blog, and was curious if you had ever noticed it and what your thoughts are. Any information you have on the chamber would also be greatly appreciated. I grew up in Harvard and once entered the chamber there when I was a kid. I'll have to revisit that site one of these days. 
I have also attached photos of a parent/chick barred owl from Hubbard Hill, and a fawn I found at the spring west of the Yellow Birch Swamp.
