W.B. Yeats book The Tower
St. 4 <br class="br">The Tower (1928), Sailing to Byzantium http://poetry.poetryx.com/poems/1575/ <br class="br">Context: Once out of nature I shall never take<br>My bodily form from any natural thing,<br>But such a form as Grecian goldsmiths make<br>Of hammered gold and gold enamelling<br>To keep a drowsy Emperor awake;<br>Or set upon a golden bough to sing<br>To lords and ladies of Byzantium<br>Of what is past, or passing, or to come.