Thoreau writes in his journal:
I see that muskrats have not only erected cabins, but, since the river rose, have in some places dug galleries a rod into the bank, pushing the sand behind them into the water . . . One I explored this afternoon was formed in a low shore (Hubbard’s Bathing-Place), at a spot where there were no weeds to make a cabin of . . .
At J. Hosmer’s tub spring, I dug out a small bullfrog (?) in the sandy mud at the bottom of the tub—it was lively enough to hop – and brought it home . . .