This poem, as a first basis, appears to have very little plot or substance - no underlying secrets, etc. A man goes out for a walk, decides to turn around, then decides to go further and see what lies ahead. The man sees a bird and ponders what the bird might possibly be thinking, until the bird finally settles behind a pile of wood. The wood is described in such a manner to make the reader realize that is has been around for quite a while. The narrator continues on, contemplating who might have left the wood there "And leave it there far from a useful fireplace..." (line 38). The poem is as ambiguous as my simplified summary. At first we come in contact with the narrator who goes out for a walk - is he escaping something, fleeing, or is he looking for something? He, during this walk, decides to turn back, and the reader questions if the narrator is returning to something, going "back" to something. He decides to continue on and "see," but the reader questions what the narrator means by that statement. Is the narrator looking to see something, as in see what happens, or see where the path leads him, or maybe see if this walk changes his life in some way?
The narrator walks through a "frozen swamp," and notices many trees that appear to be very similar, but the only different, unique items are the bird and the woodpile. It's as though the bird and the woodpile, through their uniqueness signify life; they are independent. The narrator continues on, in thought, about the bird.