Thoreau writes in his journal:
P.M.—To Ball’s Hill . . .
While I was looking at the eagle (?), I saw, on the hillside far across the meadow by Holbrook’s clearing, what I at first took for a red flag or handkerchief carried along on a pole, just above the woods. It was a fire in the woods, and I saw the top of the flashing flames above the tree-tops . . .