No Second Troy I believe has its meaning and source rooted in Yeats profound affection for Maude Gonne.  He was deeply in love with this fellow nationalist and entertainer, and though he proposed to her many times, she refused him.  In this he relizes that he cannot blame her for being everything that was perfect for him or for his falling in love with her.  Like Helen she indirectly caused the downfall of Troy and his heart.  It was merely in her nature, being the most beutiful creature on earth, who could help not fighting for her.  Because he was hurt so profoundly, Yeats felt that Maude could never hurt another so badly, there would never be a second Troy.
Reader Response:  No Second Troy
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