The triversen, or three verse sentence, is a poetry form devised by William Carlos Williams. It consists of six verses of three lines, each verse being a complete sentence. There is no rhyme scheme or strict metre, but must have a count of two, three or four stresses to each line. We hang their daily larder - seeds, fat balls, nuts - in the shelter of the lilac. The back door closes as the first acts arrive, no first night nerves for them. Bluetit, bullfinch, chaffinch all take their turn waiting in the wings. Woodpigeons provide the comic touch, clumsily clinging, and swinging, greedily outstaying their welcome. The garrulous greenfinch gang in fours, and fives, and sixes, flash red and yellow, and are gone. Our feathered cabaret disappears with the dusk; ...