Randy, its a monument for sure, possible trails shown in different directions, main Mission direction may be toward the direction the head is pointing, I have been trying to get someone to measure the distance between monument and Mission but sofar not one answer, possible deadly trail, no water, turtle to me indicates slow,and long trail carry plenty of supplies, the distance could be as far as 25 miles ( 2.5 leagues X 10 ) . Thats just my guess, I think they used a Mission as a hub and started in a predetermened direction where they had mines and at that point the trails seperated into different directions / distances to the mines / trails. from there you should be able to pick up trail markers, chesk from where the tail points to other monuments 25 miles away. Its really not that complicated. If I don't get any information back to verfiy what I think they represent then I will go the way of lost horse and other, its your call