Those barren hollows and plains in the neighborhood of Walden are singular places.
I see many which were heavily wooded fifteen or thirty years ago now covered only with fine sedge, sweet-fern, or a few birches, willows, poplars, small wild cherries, panicled cornels, etc. They need not amount to hollows at all: many of them are glades merely, and all that region is elevated, but the surrounding higher ground, though it may be only five or ten feet higher, will be covered with a good growth. One should think twice before he cut off such places. Perhaps they had better never be laid bare, but merely thinned out. We do not begin to understand the treatment of woodland yet. On such spots you will see various young trees - and some of them which I have named - dead as if a fire had run through them, killed apparently by frost.