Thoreau writes in his journal:
Skated to Sudbury. A beautiful, summer-like day. The meadows were frozen just enough to bear. Examined now the fleets of ice-flakes close at hand . . . Again I saw to-day, half a mile off in Sudbury, a sandy spot on the top of a hill, where I prophesied that I should find traces of the Indians. When within a dozen rods, I distinguished the foundation of a lodge, and merely passing over it, I saw many fragments of arrowhead stone. I have frequently distinguished these localities half a mile [off], gone forward, and picked up arrowheads.