a. Acton, Conant Brook. A Triangular "fly" with black and white shoulders.
b. Carlisle. A rectangular figure with black and white shoulders. Faces South
c. Mill Street, East of road in Lexington. Outline with a heart. Faces South.
d. One of 3 Christian Indian Graves at Sarah Doublet Forest Littleton, faces North. Put here for comparison.
e.Littleton - "TwoBrothers Trail". An Isosceles Triangle with a yellow apex.

a.   b  c. 
d.   e.