What details—and comparative images—does Douglass use at the start of paragraph 2 to explain his statement: “There I was in the midst of thousands, and yet a perfect stranger”?

an informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.

answer; the people,; the elected officials;