Perimeter Sightline

Stepped past the maple wing vane and assessed the upper bark furrow. A dry, clear plastic button lay wedged between two rough ridges of timber, four needle holes intact. Stiff material. I hauled it upright with steady leverage and cleared the wood dust from the edge. Two paces out, a discarded copper wire staple rested caught in the bark moss. I threaded one prong through the center button hole and drove the other firmly into a vertical wood fissure. Peering through the clear circle, it frames the crosswalk below with pinpoint accuracy. Forward grid aligned.