Fragment: 'Wake the Serpent Not'

Wake the serpent not--lest he
Should not know the way to go,--
Let him crawl which yet lies sleeping
Through the deep grass of the meadow!
Not a bee shall hear him creeping,
Not a may-fly shall awaken
From its cradling blue-bell shaken,
Not the starlight as he's sliding
Through the grass with silent gliding.