Yes that certainly is poetry, and exceedingly memorable poetry ... the image in those last two lines has stuck in my brain since I first read them many years ago ... even if I did muddle myself up ... why did I think it was Sylvia Plath ? Sorry to Stevie Smith now ! I'm not sure, though, that I'd actually want to hear that to music .. it doesn't strike me as a poem that actually _needs_ any addition, being fairly stark in outline and content.