Thanks Bill, Theres still so much to learn, as the one that pearl posted it seems that it goes down aways and then changes width which changes everything and I know they carved information in the bottom, around the top edge in a series of pecks and in order to see them you have to use that reverse immaging and paint to enhance what they left, there's so many different types, its very important to carry a can of air ( be careful about your face and especially eyes ) they also used features of the profile of the boulder such as an egg, eagle head, round bottom has a meaning, flat bottom has a meaning, a 3mm drill hole in the botton ( never seen one in the side ) 1 inch in the bottom has a meaning, bottom comes to a sharp point 3 inches across the bottom has a meaning, as far a distance goes its basicly the same pattern as as trail markers monuments, small = short distance, big = long distance, they did use feet, yard, fractions of a cordel, fractions of a league, 7 cordels = aprox 1/4 mile was used on the square league borders, if you are able to see the profile from both sides then its seprerating two square leagues one for each side, if it can only be viewed from one side then thats the one it represents. Its not hard to figure out the property borders that I have seen had waist high flat ( standing on edge ) and waist high boulders that were carved with a profile going both ways and some that have only one way, I think that the heigth ( length if its flat on the ground ) will tell a story of its own or has a reason for being where its at and for what it will tell you, they will put so much in a small and its very confusing for a reason, in my opinion the ones that have E /W / N/ S headings are the ones that very possibly are the ones that you can use, when you find those that are knee high ( horzional / vertical ) may be windrose markers and yes its very possible that the will be included in a yard. I can't get any feed back on what folks find in the field to support what I have seen. It may be too doggone hot, lots of critters, finances, and other matters.