For a very cool montage of Forrest Fenn created by Iron Will, see this over on Dal’s blog— http://dalneitzel.com/2015/04/04/scrapbook-one-hundred-thirty-five/#comments
Another winter gone and I haven’t gotten any closer to the solve. Still pondering. . . .
Maybe I need one of these tools:
http://commons.wikimedia.org/wiki/File:Horus_Sundials_Portable_Horizontal_Sundial.jpg