I think those lines of Peter Bond’s rank as poetry because of the beautiful imagery used (tumbling, laughing, etc). Whilst I certainly agree that poetry does not have to rhyme at all, there are actually some half rhymes or imperfect ones internally, like ‘evening’ and ‘peal the’, as well as the alliteration of ‘tower’ and ‘tumble’. I doubt if these were deliberately chosen, because a seasoned poet or lyricist will naturally include such devices as they write.