We used to find them often enuf when I was a kid. But the best find wasn't an arrowhead. My brother and I were building a fence for a neighboring farmer when we decided to take a break, and have lunch under a big old oak tree that stood alone in the pasture. A big one, with spreading branches and a massive trunk. We leaned up against that tree and had our grim little lunch, a cold biscuit from breakfast, and a can of Vienna sausages, tepid water from a shared canteen. I looked down and saw a stone that caught my eye. I looked at it for a bit, for it was well camouflaged with lichen and such. Then I recognized it for what it was. I gave a shout, reached down and picked it up. "Look!" I shouted, and held it up. A perfect axe head had been laying under that ancient tree for unknown centuries. It had clearly been laying there beneath the old tree the whole time! It was well papered with lichen, and had the old stone appearance. I doubt it was ever covered with earth. I can well remember the thrill I felt holding that shaped stone in my hand!!