The aesthetic problem Berryman sets himself when he decides to write actions and discourse for his unmanageable Id has been solved here, as elsewhere, by relying on broad cartoon-like strokes. The Id is represented in several ways: by incoherence of affect ("O ho alas alas / When will indifference come"); by childish regression of action and words ("I’d like to scrabble till I got right down / away down")’ by interspersed melodramatic nonsense-syllables of revenge ("open ha to see," "grave clothes he & then"); and by a temporary abandon (between the sixteenth and seventeenth line) of end-punctuation of any sort. The final tableau – as Henry in self-pluralizing wish ("we") takes an ax to his father’s casket, rips the decayed wrappings of the corpse, and then drives the ax into his father’s body – resembles in its components an episode out of Poe, but it forgoes Poe’s ghastly ceremoniousness of action and diction: this is why the Dream Songs deserve the name of "cartoon." The reductiveness and garishness and violence we associate with cartoons – and do not normally associate with our "sensitive" therapeutically-presented selves – are Berryman’s startling comic means toward representation of his irrepressible Id. Cartoon-strokes enable him to render his life-donnée in literary terms, at the considerable cost of an occluded and alienated authorial self, concealed behind its puppets.
From Helen Vendler, The Given and the Made: Strategies of Poetic Redefinition (The T. S. Eliot Memorial Lectures at the University of Kent), (Cambridge: Harvard U P, 1995), 51-52.