Call and response. The breathing body of poetry from the beginning. The psalms of David, the wave of them, rise and fall of plainchant, verse and response. The constantly shifting pause between the half-lines of Old English poetry and the poems of the Edda, the half-lines of the Kalevala swayed out four-handed on the saga bench. So I thought towards the two-line stanza as experiments in duration, in complex syntactic and melodic demands. The melody...