Who becomes Brydon's constant companion when her returns to New York in the novel, The Jolly Corner?

While in New York, Spencer renews an acquaintance with an old friend, Alice Staverton. Spencer's family—his parents, two brothers and "favourite sister"—are dead and Alice is the only remaining person he was close to in his youth. Throughout the story, Alice accompanies Spencer as he visits his property, listening to him reminisce. Of all the people he meets in New York, only Alice has the patience and deep sense of the past necessary to understand his complex reactions and emotions.