Why does king begin his letter with a reference to his audience

When gatsby was in europe after world war i and circumstances forced daisy and him to face unpleasant realities about their relationship,

Gatsby comment that nick looks familiar to him. what surprising connection do they have?

Review the passage from “the listeners.” for he suddenly smote on the door, even louder, and lifted his head: — "tell them i came, and no one answered, that i kept my word," he said. based on this passage, what is the best inference about the man?