text:  His object is to show the strength of shadow--how "the shadows on the trunk of the tree become darker and more conspicuous than any part of the boughs or limbs;" so for this strength and blackness we have-- "At the root Of that tall pine the shadow of whose bare And slender stem while here I sit at eve Oft stretches tow'rds me like a long straight path Traced _faintly_ in the greensward