Thoreau writes in his journal:
P.M.—Up Assabet.
It soon cleared off in the morning, and proved a fair but windy day. I see a willow six inches in diameter which was broken down by the ice . . . I notice this havoc along the stream on making my first voyages on it. The ice either freezes to the alders, etc., one half to two thirds up them, and settling, breaks them lower down, settling upon them, or else freezes to drooping limbs and so pulls them down.