Thoreau writes in his journal:
P.M.—Up Assabet.
Owing to the rain of the 8th and before, two days and two nights, the river rose to within six inches of the top of Hoar’s wall. It had fallen about one half, when the rain began again on the night of the 20th, and again continued about two nights and two days, though so much did not fall as before ; but, the river being high, it is now rising fast. The Assabet is apparently at its height, and rushing very swiftly past the Hemlocks . . .