The river is quite low,

November 6. 

The river is quite low, about four inches lower than the hub [?] I used in the summer, or lower than before, this year. 

Yet there is more water in the mill-streams; the mill-wheels are supplied now which were stationary in the summer. 

C. thinks that he saw bats last evening.

H. D. Thoreau, Journal,  November 6, 1859

The river is quite low, . . .lower than before this year. See November 26, 1858 ("I begin to suspect . . . that this rise and fall extending through a long series of years is not peculiar to the Walden system of ponds, but is true of ponds generally, and perhaps of rivers, though in their case it may be more difficult to detect."). Compare October 19, 1857 ("The river is very high for the season and all over the meadow in front of the house, and still rising."); October 27, 1853 ("The river still rises, — more than ever last night, owing to the rain")

The mill-wheels are supplied now which were stationary in the summer. See August 26, 1859 ("Mill-wheels that have rested for want of water begin to revolve again.")