Who is Spenser Brydon from Tales of Henry James: The Texts of the Stories, the Author on His Craft, Background and Criticism and what is their importance?

Spenser Brydon is a fifty-six-year-old American man who has lived in Europe for the past thirty-three years. He returns to New York after the long absence, and is amazed by the changes. This move sparks a deep insecurity in Brydon, and he begins to wonder what he would have been like if he had stayed in New York and become a wealthy businessman instead of living in Europe as an art-lover and a bit of a dreamer.