Damp grass poetry has a weaker, more monotonous rhythm. The poetry of damp grass is brought to your attention by varying this basic, repetitious, movement. As when a hand brushes your leg, instead of passing the cucumber sandwiches. Fades to some dank suf fic ient heav en . The third line brushes the leg, denying it meant to.
Nature is responsible.
Notice the fish swimming in the middle of suf fic ient . This is clever stuff, because the poem is about a fish. But not as clever as nursery rhymes. The poems of Robert Graves are carefully preserved in books. Nursery rhymes swim through wild seas across generations of parents and children.