Niagara

In Chapter 13, Vincent Hemmingway finally comes to see Mary in London after she was been waiting. They were in a ways at a loss of words, so Mary asked him about his travels. He began talking about Niagara and says, ""Niagara," said Hemming, with a certain solemnity, "Niagara is something like London. The great falls, you know, are not beautiful; neither is London. But they are, like London, a unique, a terrifying spectacle. The roar, the immensity, the sense of a great power for ever driving forward; all these things are identical. Some day Niagara will have dried up, retreated, become a mere dribble among waterfalls. Some day London will be a handful of ruins."" After that, Mary exclaims how negative he is and then asks him why he didn't come visit her the day prior. The thoughts of why he didn't come consumed her.