Perceptions and opinions may vary (for differing reasons), of course. That's what makes a horse race, or so they tell me. My observation of the rock structures in the field, even though they are crumbling somewhat, and the resemblance of the figures to those as described by Kenworthy, along with his voluminous pages of research results, leads me to a similar conclusion as he has postulated. My view is that these rock structures I observed were worked by hand, and up close you can see tool marks, cuts, grooves and striations in the stone similar by example, as what is most noticeable when exa