Pancho, the poem does not have a regular rhythm as far as the number of syllables and the stress of syllables per line. It is not consistent. Keep in mind that MS was not trying to be a poet (he's already an author and artist) when he made the clues. It is the information that is important, not the rhyme and rhythm, so the lines may be somewhat contrived--certainly the story is nontraditional (presents text that is not understandable in the dream section).