We just went from one known corner to the next. Each found corner had to match the description of the trees exactly. We did accept stump holes as partial evidence if we had one scribed tree. We didn't have GPS back then. It hadn't been invented yet. I found one on a granite knob that only had one down tree. The wind had blown some sand and the tree was reduced to something the size of a limb. But the pitch on the blaze preserved it. Before finding it I put myself within 80' with a compass and map