These are some of the things that roll around in my head it may help don't know yet and they are just what I have seen and worked out, They did mark a square league at each corner and had waist high markers along the trail between the corners, they had cache sites at each one that I have seen, the league is numbered, thed have a windrose on that I have worked from top to bottom, sites are layed out in a triangle / square / and rectangle, the NW corner seems to be the perfered corner. They marked the corners with useful information, the south east corner seem to have information to the layout of the site, the north east corner seem to have info the depth and how its placed in the ground, the north west corner shows the direction and distance to travel and its verivied by information between the corners, add all the distances between the corner markers they will be measured by cordel or portions of cordel, 190 feet / 95 feet and so forth, using direction indicators at the nw corner ( regardless if its a triangle / rectangle / square. an example is 95 ft / 189.5 ft / and 189.5 feet using the direction at the nw corner you will find the first symbol of the windrose, there will only be two and you must locate the others using info off those that you have found, everything works the same regardless if its a trtiangle / square / rectangle, they did use numbers and letters also XX= 1010 feet fron windrose to windrose one is easy and can be measured to use to work the other one, when you find a marker thats knee high look aruund, under, on top, sides, and bottom if two men can turn itover , NEVER pull one standing on the down hill side. OK I changed my mind about not posting this, everything they did using the different layout they could change the distances pretty good. Thats not all but my finger is tired