in Thoreau’s Journal:
The white birches being now generally bare, they stand along the east side of Heywood’s meadow slender, parallel white stems, revealed in a pretty reddish maze produced by their fine branches. It is a lesser and denser smoke (?) than the maple one. The branches must be thick, like those of maples and birches, to give the effect of smoke, and most trees have fewer and coarser branches, or do not grow in such dense masses.
Nature now, like an athlete, begins to strip herself in earnest for her contest with her great antagonist Winter. In the bare trees and twigs what a display of muscle!