| Quote #1 Although, as boys, we had been even intimate associates, yet I really knew little of my friend. His reserve had been always excessive and habitual. (3) |
And even as the narrator gets to know Roderick again, there remains a barrier between them. Roderick remains excessively reserved.
| Quote #2 I had learned, too, the very remarkable fact, that the stem of the Usher race, all time-honoured as it was, had put forth, at no period, any enduring branch; in other words, that the entire family lay in the direct line of descent, and had always, with very trifling and very temporary variation, so lain. (3) |
The Usher family was as self-isolating and insular as Madeline and Roderick seem to be. Insular means lacking contact with other people.
| Quote #3 The windows were long, narrow, and pointed, and at so vast a distance from the black oaken floor as to be altogether inaccessible from within. (7) |
There is a definite sense of confinement here; the windows are out of reach, to escape is impossible.