This is a sketch of a site I found this weekend and I am sorry I did not explore that third bump. Note how most of the piles are to one side of the viewing position but with some outliers.The best documented example of a grid site, which I consider an example of a marker pile site, is the one we surveyed at Spring Hill in Acton, MA
We can look at this with fresh eyes and observe the nearly horizontal lines converging to the right. There is a hight point in that direction but I do not know if it lines up. There also might be high points in the other directions indicated by the families of parallel lines in the diagram.


















































